BPS, BPF — are structurally similar, less studied, and there > is emerging evidence of comparable activity. **"BPA-free" is a label change, not necessarily a > safety improvement.** > > 📉 **Evidence quality:** Substantial mechanistic and exposure data; genuine and unresolved > disagreement about the → Nutrition Science: What the Evidence Actually Says About What to Eat
agave is mostly fructose, honey is mostly sugar, and 100% fruit juice delivers a soda-like dose. *(The "it's just calories" argument tends to lose the other half's practical force — see Q13's explanation.)* §18.5. → Nutrition Science: What the Evidence Actually Says About What to Eat
"Nil by mouth from midnight" is not supported
clear fluids to ~2 h, light meal to ~6 h. 🟢 **preoperative carbohydrate loading (ERAS)** · 🟢 **early postoperative feeding** · 🟢 **prehabilitation** · 🟡 immunonutrition · ✅ **preoperative optimization in malnourished patients** — ⚠️ **which means identifying them in clinic, not on the ward.** → Nutrition Science: What the Evidence Actually Says About What to Eat
> the amount of muscle and strength required to rise from a chair unaided, climb a flight of stairs, > carry shopping, and catch yourself when you stumble. > > **Everything that matters is about where the sloping line crosses the horizontal one**, and only two > things determine that: **how high you → Nutrition Science: What the Evidence Actually Says About What to Eat
the highest-leverage item at three separate stages | | **Vitamin D and B12 in older adults** | **~$35/year combined** | | ⚠️ **Home food fortification** *(milk powder, cheese, oil, nut butter)* | ⚠️ **Cheap — and more effective than most oral nutritional supplements at a fraction of the price** | | → Nutrition Science: What the Evidence Actually Says About What to Eat
$100–$250
measuring resting metabolic rate by indirect calorimetry, which is > a genuine measurement with genuine test-retest variability, then handing you a number to the calorie > that will be quoted back to you as though it were fixed. > > None of these is a scam, and the RMR measurement in particular is r → Nutrition Science: What the Evidence Actually Says About What to Eat
40,000 adults suggests a cohort, so rung 5, so confounding and > healthy-user bias apply immediately. **(2) Effect size** — "significantly better" in 40,000 people > could be a difference too small to notice; ask for the actual magnitude on the actual scale. > **(3) Compared to what** — what were lo → Nutrition Science: What the Evidence Actually Says About What to Eat
(b) needs a supplement now, without testing
folic acid, starting **before** conception. §13.6 > explains why this one doesn't wait for a test: the neural tube closes in the first few weeks, often > before a pregnancy is recognized, so the window closes before testing would help. > > **(d) needs a supplement, unambiguously** — B12, which is un → Nutrition Science: What the Evidence Actually Says About What to Eat
**below the RDA of 0.8**, and roughly half a reasonable target of 1.0–1.2 > g/kg (88–106 g) for a man his age. > > What I'd tell him: he is spending **$2,244 a year on nine supplements** (Chapter 16) while eating > less protein than the minimum, at an age when the requirement is rising and the conse → Nutrition Science: What the Evidence Actually Says About What to Eat
0.80
neither 0.7 (pure fat) nor 1.0 (pure carbohydrate). This is a direct, routine measurement, not an inference. The mechanistic reason is that both fuels converge on **acetyl-CoA** and feed the same citric acid cycle, so there is no separate machinery to switch between. → Nutrition Science: What the Evidence Actually Says About What to Eat
1 extra breast cancer case per 75 women,
lifetime
real, small per person, dose-dependent, and stacking with everything in §12.6–§12.7. *No single number in this chapter is frightening; the sum is what moved the guidelines.* **And notice it's structurally identical to Chapter 11's fiber arithmetic** — if you found one persuasive and the other dismis → Nutrition Science: What the Evidence Actually Says About What to Eat
**Ch 36 §36.7 ranked education last, and pointed at this book.** ⚠️ **2. It was for the list** — **refuted by Ch 37's hook; he already knew the list.** ⚠️ **3. IT WAS FOR THE FILTER** — **one addition, thirty avoided changes.** → Nutrition Science: What the Evidence Actually Says About What to Eat
you cannot know the dose of anything. 800 mg across seven ingredients could > be 780 mg of the cheapest and traces of the rest (§16.4's fairy dusting). **Unassessable = unsupported.** > > **2. ⚠️ Biotin, at an unknown dose, in a product taken daily.** This is Walt's problem exactly. Nobody > buying → Nutrition Science: What the Evidence Actually Says About What to Eat
often the whole intervention. **2.** Try 12:12 or 14:10 first. **3. ⚠️ If timing is your reason, shift EARLY, not late.** **4.** Protein target inside the window + resistance training. **5. ⚠️ Watch for the 7:45 rush** — hurried, standing, unplanned, not hungry. **6. Expect the effect to fade — that → Nutrition Science: What the Evidence Actually Says About What to Eat
1. ⚠️ Start with drinks
✅ and requires cooking nothing. **2. ⚠️ Use Group 3 aggressively** — tinned beans, tomatoes, fish; frozen veg and fruit; oats; plain yoghurt; eggs. **3. Attack the snack layer, not meals.** **4. Slow down** — harder, chewier food does it free. **5. Cook slightly more, not everything.** **6. ⚠️ Read → Nutrition Science: What the Evidence Actually Says About What to Eat
below anyone's detection threshold — ≈ **10 lb/year** before adaptation. This is how people gain 30 lb across a decade without ever feeling they overate. - **A deficit you sustain beats a deficit you survive.** 200 kcal/day for a year beats 1,000 kcal/day for two weeks, by a very wide margin. → Nutrition Science: What the Evidence Actually Says About What to Eat
never previously measured | | **Medication** | Metformin 1 g twice daily | | **BP** | 148/88 | | **Triglycerides** | 2.6 mmol/L | | **ALT** | ⚠️ **61 U/L** — flagged on three previous panels, never explained to him | | **Lp(a)** | ⚠️ **92 nmol/L** — never measured until now | → Nutrition Science: What the Evidence Actually Says About What to Eat
and note that "up to" means this is the ceiling, typically drawn > from the best result in the best short-term study, often at a dose higher than the product contains. > A realistic average effect might be half that or less, and tolerance may reduce it further. > > **Does 128 kcal/day matter?** Comp → Nutrition Science: What the Evidence Actually Says About What to Eat
⚠️ **especially with alcohol reduction** | | **Blood pressure** | **2–4 weeks** for dietary pattern; ⚠️ **sooner with alcohol reduction** | | **Liver fat** | ⚠️ **Weeks — among the fastest structural changes in the body** | | **LDL-C** | **4–6 weeks** to a new steady state | | **HbA1c** | ⚠️ **8–12 → Nutrition Science: What the Evidence Actually Says About What to Eat
and these are widely sold as fasting-compatible | | **"Zero-calorie" sweetened drinks** | 🟡 **Genuinely uncertain** — small or absent metabolic effect; **cephalic-phase responses are debated** (Ch 18 §18.13) | | **A meal** | It's a meal | → Nutrition Science: What the Evidence Actually Says About What to Eat
but 1,000–2,000 IU is enough | | Fish oil | 2 g EPA+DHA | 🟡 Marginal at this dose; he doesn't eat fish, so defensible | | Magnesium glycinate | 400 mg | 🟡 Plausible; his intake is low; cheap; low risk | | Curcumin/turmeric | 1,000 mg | 🟡 Real mechanism, unimpressive human outcomes, poor absorption | → Continuity Tracker — *Nutrition Science*
24-hour recall
what did you eat yesterday — is more accurate for yesterday but yesterday might not be typical, so you need many recalls per person, which is expensive. **Food diaries** are better still, and change behavior the moment you start keeping one (people eat differently when they're writing it down, which → Nutrition Science: What the Evidence Actually Says About What to Eat
genuinely low, and correcting deficiency is ✅. Dose reduced from 5,000 to 2,000 IU because **the evidence supports correcting deficiency, not maintaining high intakes indefinitely**, and 5,000 IU without monitoring is above what the situation warranted. → Nutrition Science: What the Evidence Actually Says About What to Eat
so you can tell whether the person is in the group and whether the > intervention worked. Ferritin. 25(OH)D. Serum B12. **This is what magnesium lacks (Ch 14 §14.4) and > why its verdict is 🟡 despite a plausible case.** > > **4. A hard outcome, not a marker** — neural tube defects, not homocysteine. → Nutrition Science: What the Evidence Actually Says About What to Eat
Chapter 13 §13.2. It was derived from **observed median intakes in apparently healthy populations**, not from a measured requirement. It describes what adequately hydrated people happen to drink, which is a much weaker kind of number. → Nutrition Science: What the Evidence Actually Says About What to Eat
**or sitting up if they are struggling to breathe, or on their side if vomiting or unconscious.** ⚠️ **Do not stand them up or walk them anywhere.** **Sudden posture change has been associated with deterioration.** → Nutrition Science: What the Evidence Actually Says About What to Eat
⚠️ **she was advised toward the behaviour maintaining her illness, repeatedly, by people acting on standard guidance.** **§34.4 is why this happens and why several countries' clinical guidance now says weight should not determine access to assessment.** → Nutrition Science: What the Evidence Actually Says About What to Eat
3. ⚠️ The fastest loss produced the fastest regain
until they stopped. Which brings us to: > > **5. She's an endurance athlete**, and the athlete-specific losses stack: **foot-strike hemolysis**, > GI microbleeding, sweat losses, and — importantly — **exercise-induced inflammation raises hepcidin**, > which *suppresses* absorption for hours after ha → Nutrition Science: What the Evidence Actually Says About What to Eat
**meaningfully lower than an endurance athlete's, and higher than most lifters eat** | | **Protein target** | ⚠️ **1.6–2.0 g/kg = 130–160 g**, in 4–5 doses of ~25–35 g | | **Around the session** | **A meal 1–3 h before; a meal within a few hours after.** ⚠️ **The urgency is low** (§23.6) | | **Creat → Nutrition Science: What the Evidence Actually Says About What to Eat
drink, gel or real food; **sodium if hot** | | **Within 1–2 h after** | Rice/pasta/potato + protein source + vegetables — **~100 g carbohydrate, ~20 g protein** | | **Evening meal** | Similar | | **Before bed** | ⚠️ **~30–40 g protein** if training again tomorrow | | **Day total** | ⚠️ **~360–420 g → Nutrition Science: What the Evidence Actually Says About What to Eat
7 files per chapter
the chapter, exercises, a quiz, two case studies, a takeaways card, and annotated further reading - **12 appendices** — nutrient reference tables, a calculation toolkit, an evidence-evaluation toolkit, a master index of every claim verdict in the book, worksheets, supplement evidence grades, a gloss → Nutrition Science
7 kcal per gram
between carbohydrate/protein (4) and fat (9) — and unlike the three macronutrients, **you have no storage form for it and no way to excrete meaningful amounts.** A small fraction leaves in breath and urine; the rest must be metabolized. → Nutrition Science: What the Evidence Actually Says About What to Eat
in the same cohorts, in the same analyses. ⚠️ **Same fruit, same sugars, matrix removed and dose rate increased.** The best natural experiment available on the matrix question. *(Still observational — Chapter 2's caveats apply.)* §18.3. → Nutrition Science: What the Evidence Actually Says About What to Eat
~0.55 L/hr in cool weather, ~0.85 L/hr in warm
genuinely low, which is typical for a smaller, slower runner and which she had no idea about | | **Drinks to thirst** | Rather than to a schedule. Current endurance guidance. | | **Uses sodium-containing fluid** for long or hot runs | Not for everything | | ⚠️ **No NSAIDs around endurance events** | → Nutrition Science: What the Evidence Actually Says About What to Eat
~12 g/day
legumes, oats, wheat and several vegetables all gone | | **Calcium** | ⚠️ **Low — all dairy removed** | | **Weight** | −6 kg, unintentional | | ⚠️ **Ferritin** | ⚠️ **Low** *(Chapter 14)* | | ⚠️ **Eating with others** | **Stopped** | | ⚠️ **Anxiety** | ⚠️ *"I've started reacting to things that aren' → Nutrition Science: What the Evidence Actually Says About What to Eat
⚠️ **because in-utero iron stores deplete**, so **iron-rich first foods matter most.** ⚠️ **NO HONEY before 12 months (botulism) — the absolute rule.** No added salt or sugar. **Cow's milk not as a main drink before 12 months.** Choking hazards. 🟡 **Baby-led weaning vs purées — no strong difference. → Nutrition Science: What the Evidence Actually Says About What to Eat
canon device: **"look at the two lunches and ask which you'd finish faster."** **§22.4 maps the trial against Ch 2's problems one by one** (randomized · crossover · no self-report · gram-measured · nutrient-matched · healthy-user bias eliminated). ⚠️ **Limits stated plainly: n=20 · 2 weeks · unblind → Continuity Tracker — *Nutrition Science*
§24.1b WHAT DETERMINES BODY WEIGHT
**BMI heritability 40–70%, comparable to height** · food environment · ⚠️ **MEDICATIONS (antipsychotics, some antidepressants, corticosteroids, insulin/ sulfonylureas, some antiepileptics, hormonal treatments) — "the most actionable item and the least discussed; CHECK THE TIMELINE FIRST"** · sleep · → Continuity Tracker — *Nutrition Science*
§25.1 THE SHAPE TABLE
energy / protein-per-kg / micronutrients / required nutrient density across six stages. ⚠️ **THE CENTRAL MISMATCH: in older age ENERGY FALLS while PROTEIN AND MICRONUTRIENTS RISE — so required NUTRIENT DENSITY is HIGHEST AT 80, arriving exactly as appetite, taste, dentition, cooking capacity, income → Continuity Tracker — *Nutrition Science*
§38.5 REPORTS THE VERDICT DISTRIBUTION EXACTLY
**468 verdicts: ✅ 133 · 🟢 97 · 🟡 91 · ❌ 69 · 🟠 67 · ⚗️ 11; AFFIRMATIVE 230 vs UNCERTAIN/NEGATIVE 238.** ⚠️ **✅ named as the largest category and EXPLAINED rather than celebrated** (Ch 29 §29.16's answer: many are clinical/legal/ definitional/physiological facts, not dietary findings; Ch 30 alone gav → Continuity Tracker — *Nutrition Science*
⚠️ **No regulated or agreed meaning. A values position in a scientific costume, and the presentation the culture most actively supplies.** *(Ch 20, Ch 34 §34.9)* → Appendix I — Glossary
⚠️ "Detox"
⚠️ **❌ throughout. The liver and kidneys do this; no commercial product improves on them.** *(Ch 17)* → Appendix I — Glossary
⚠️ "Natural"
⚠️ **Not a regulated term in most jurisdictions. Tells you nothing.** *(Ch 20, 30)* → Appendix I — Glossary
⚠️ "Superfood"
⚠️ **A marketing category with no scientific definition.** *(Ch 17)* → Appendix I — Glossary
high, medium, low, zero, out. > > **⚠️ 3. Put the ZERO night in first**, as the bad-night meal (§31.11). > > **⚠️ 4. Put the HIGH night in second**, as the cook-once night — deliberately oversized (§31.12). > > **⚠️ 5. Put the night AFTER it in third**, as assembly from the surplus. > > **⚠️ 6. Fill → Nutrition Science: What the Evidence Actually Says About What to Eat
⚠️ **the guide to the course's actual deliverable, and it includes the three problems with that claim so you can teach it honestly.** → Instructor Guide — Overview
⚠️ `teaching-sensitive-topics-guide.md`
⚠️ **non-optional.** **Its premise: in any class of reasonable size some students have an eating disorder and some are food insecure, and neither group will tell you.** ⚠️ **It contains the assignment design rules, and the single most important one is that you never assign a food diary.** → Instructor Guide — Overview
⚠️ **Sugars added during processing or preparation, plus those in syrups, honey and juice concentrates.** ⚠️ **Distinct from sugars intrinsic to whole fruit and milk, and the distinction is defensible: it tracks the food matrix rather than the molecule.** *(Ch 18)* → Appendix I — Glossary
⚠️ Adherence
⚠️ **Whether a person actually follows a dietary pattern over time.** ⚠️ **Chapter 10's threshold: it beats composition, and the best diet is the one you'll actually eat.** *(Ch 10)* → Appendix I — Glossary
⚠️ **A rapid, potentially fatal allergic reaction. A medical emergency requiring adrenaline.** *(Ch 28)* → Appendix I — Glossary
⚠️ And ORTHOREXIA
**preoccupation with the healthfulness rather than the quantity of food** — ⚠️ **is not a formal diagnosis in DSM-5-TR or ICD-11.** **⚠️ It describes something real and recognizable that clinicians see, and §34.9 takes it seriously without pretending it has a status it does not have.** → Nutrition Science: What the Evidence Actually Says About What to Eat
⚠️ **All features of anorexia nervosa except a low weight.** ⚠️ **Not atypical, not milder, and the name is an artefact of a diagnostic system built around weight.** *(Ch 34)* → Appendix I — Glossary
⚠️ **Established care in diabetes. In people without diabetes, 🟡 — real educational value briefly, no outcome evidence, and severe interpretation risks.** *(Ch 35)* → Appendix I — Glossary
⚠️ Convergence
⚠️ **Independent lines of evidence arriving at the same conclusion.** ⚠️ **Chapter 37's central structural argument, resting on Chapter 35 §35.10 and Chapter 36 §36.9.** *(Ch 37)* → Appendix I — Glossary
⚠️ EAR (Estimated Average Requirement)
⚠️ **The amount meeting the needs of half a population. The scientifically central figure, and the one nobody quotes.** *(App A)* → Appendix I — Glossary
⚠️ Energy availability
⚠️ **Energy intake minus exercise energy expenditure, relative to fat-free mass.** ⚠️ **Low energy availability underlies RED-S.** *(Ch 15, 23, 34)* → Appendix I — Glossary
⚠️ **Costs of producing food that are real, are paid, and do not appear on the receipt — emissions, land, water, health, labour.** *(Ch 36)* → Appendix I — Glossary
⚠️ Food matrix
⚠️ **The physical structure of a food, which changes how its nutrients behave.** ⚠️ **Why whole fruit and fruit juice differ despite similar sugars.** *(Ch 18, 22)* → Appendix I — Glossary
⚠️ **The ultra-processed category in the NOVA classification.** ⚠️ **The system has real definitional problems and the ward-trial finding is real. Both.** *(Ch 22)* → Appendix I — Glossary
⚠️ Healthy-user bias
⚠️ **People who do the healthy thing differ from those who don't in many other ways.** ⚠️ **Chapter 2's threshold, and the reason most nutrition headlines are wrong.** *(Ch 2)* → Appendix I — Glossary
dilutional low sodium, causing cerebral oedema. **Risk factors invert expectations:** slower finishers, smaller body size, female, longer events, abundant aid stations, NSAIDs, **and being conscientious about drinking.** Mild symptoms mimic dehydration, and **the instinctive response makes it worse. → Nutrition Science: What the Evidence Actually Says About What to Eat
⚠️ IgG food antibody panels
**the most widely sold, and the most consequential.** > > **What they measure: IgG antibodies to food proteins.** ⚠️ **IgG to food is a normal, expected marker > of EXPOSURE — and possibly of tolerance.** **People who eat a food regularly tend to have IgG against > it.** **The test reliably identifi → Nutrition Science: What the Evidence Actually Says About What to Eat
⚠️ IgG food sensitivity panels
⚠️ **❌ Not supported. IgG indicates exposure, not intolerance.** *(Ch 28, 35)* → Appendix I — Glossary
⚠️ In one it was a product with nothing behind it.
⚠️ **A real finding pushed past what it showed.** ⚠️ **Chapter 17's finding: the commonest shape of a retired myth, and it is not fabrication.** *(Ch 17)* → Appendix I — Glossary
⚠️ Prehabilitation
**nutrition plus exercise plus psychological preparation in the weeks before major surgery.** 🟢 **Growing evidence, particularly in colorectal and major abdominal surgery, for improved functional recovery and reduced complications.** ⚠️ **The window between diagnosis and surgery is usually treated a → Nutrition Science: What the Evidence Actually Says About What to Eat
⚠️ Preoperative carbohydrate loading
**a clear carbohydrate drink up to two hours before surgery — is a component of ERAS (Enhanced Recovery After Surgery) protocols.** 🟢 **It reduces postoperative insulin resistance and improves patient-reported wellbeing; effects on hard outcomes are more modest.** → Nutrition Science: What the Evidence Actually Says About What to Eat
⚠️ Protected mealtimes
non-urgent activity stops · **red tray or equivalent systems** flagging who needs help · **food charts that someone reads** · ⚠️ **re-feeding immediately when a procedure is cancelled** · **opening the packaging** · **getting the dentures** · **treating the nausea** · ⚠️ **and someone whose job it i → Nutrition Science: What the Evidence Actually Says About What to Eat
⚠️ **Changing a product's composition, usually in response to regulation or a levy.** ⚠️ **Genuinely works for the targeted nutrient AND does not address Chapter 22's finding.** *(Ch 36)* → Appendix I — Glossary
**after gastroenteritis, or with coeliac disease or IBD damaging the brush border — is temporary and resolves as the gut heals.** **People frequently conclude they are permanently intolerant on the basis of a fortnight after a stomach bug.** → Nutrition Science: What the Evidence Actually Says About What to Eat
⚠️ **read it to see an unsettled construct being argued about in real time.** **⚠️ The measurement instruments are contested, prevalence estimates vary wildly depending on which is used, and that variation is itself the finding.** **⚠️ It is a good case study in how a plausible clinical description → Nutrition Science: What the Evidence Actually Says About What to Eat
⚠️ **See Group 4.** ⚠️ **The mechanism appears to be matrix, energy density and displacement rather than "chemicals" — and Chapter 37 §37.9 names this as a place the book may be overconfident.** *(Ch 22)* → Appendix I — Glossary
⚠️ **Motivation to obtain. Dopaminergic, cue-triggered, and DISSOCIABLE from liking.** ⚠️ **"I didn't even enjoy it" is accurate introspection about two systems.** *(Ch 33)* → Appendix I — Glossary
⚠️ Week 1
⚠️ **Do not rush Chapter 2. Everything downstream depends on it, and `common-struggles.md` §1 explains why the concept fails to stick when it is taught as a slogan.** → Syllabus — 15-Week College Course
⚠️ **Content note posted IN ADVANCE. Institutional services and the national eating disorders organization on a slide. No numbers in the session.** *(See the sensitive topics guide, §3.)* → Syllabus — 15-Week College Course
⚠️ **Part IV is where students get defensive. Chapter 17's finding is the tool: retired myths are usually over-extensions of something real, not fabrications. It lets a student be wrong without being foolish.** → Syllabus — 15-Week College Course
⚠️ What a bad-night plan is:
**Decided in advance, so no decision is required when you're least able to make one** - ⚠️ **Made entirely from shelf-stable or frozen ingredients, so it is always possible** - **Under fifteen minutes** - ⚠️ **Genuinely acceptable to you** — **not a punishment** - **Bought as part of the standing li → Nutrition Science: What the Evidence Actually Says About What to Eat
⚠️ What a repertoire meal is:
**You know it without a recipe** - ⚠️ **You know roughly how long it takes, accurately** - **You have most of the ingredients most of the time** - ⚠️ **It survives substitution** — no coriander, use parsley; no chicken, use chickpeas - **You can cook it tired** → Nutrition Science: What the Evidence Actually Says About What to Eat
⚠️ What it costs:
**Adverse reactions during treatment are common**, and some are significant - ⚠️ **Some analyses have found that OIT increases the rate of anaphylaxis DURING the treatment period compared with avoidance**, while achieving desensitization — **a genuine trade-off that should be discussed explicitly** → Nutrition Science: What the Evidence Actually Says About What to Eat
⚠️ What it genuinely delivers:
**Economies of scale in preparation** — chopping four onions takes barely longer than one - **Fewer cooking events per week** - ⚠️ **A meal available on a zero-capacity night**, which is §31.11's whole problem - **Better ingredient use** — a whole bunch of coriander gets used → Nutrition Science: What the Evidence Actually Says About What to Eat
⚠️ What the evidence and practice support:
⚠️ **Shopping without a list produces more unplanned purchases**, and unplanned purchases skew heavily toward Group 4 (Chapter 22) - **Shopping hungry is worse** — a small, real, replicated effect - ⚠️ **Online ordering removes the aisle**, which cuts impulse purchasing substantially — **and it is o → Nutrition Science: What the Evidence Actually Says About What to Eat
**real educational value briefly, no outcome evidence, and severe interpretation problems.** ⚠️ **A postprandial rise is your body working, and "flatter is better" pursued honestly recommends avoiding fruit, legumes and whole grains.** → Nutrition Science: What the Evidence Actually Says About What to Eat
⚠️ §37.1: boring works in four ways
⚠️ **you can still be doing it in five years** (Ch 10) **· it requires no decisions** (Ch 33) **· it has no novelty premium to lose · and it is robust to being wrong about the details**, ⚠️ **which matters because this book has been wrong before and will be again.** → Nutrition Science: What the Evidence Actually Says About What to Eat
⚠️ §37.2: three independent routes converge
⚠️ **individual personalization** (Ch 35 §35.10), ⚠️ **planetary analysis** (Ch 36 §36.9), **and population guidelines.** ⚠️ **The independence is partial and the environmental route is the genuinely separate one. That is what makes the convergence worth something, and I would not claim more.** → Nutrition Science: What the Evidence Actually Says About What to Eat
EA = (intake − exercise expenditure) ÷ FFM; **~45 supports full function, <~30 shows consequences.** IOC consensus statements, evolved from the Female Athlete Triad, **any sex.** ⚠️ **CANON LINE, repeat in Ch 25/34: "performance decline is one of the LAST things to go" — which is why athletes presen → Continuity Tracker — *Nutrition Science*
❌ Not supported
**Chapter 28 §28.13 gave this in full.** **IgG indicates exposure, not intolerance** | | ⚠️ **Hair mineral analysis** | ⚠️ **❌ Not supported for nutritional assessment.** **Split samples sent to different labs return different results** | | **Live blood analysis** | ⚠️ **❌ Not supported** | | ⚠️ **" → Nutrition Science: What the Evidence Actually Says About What to Eat
❌ §27.3 consumer testing
no validated reference range · platform disagreement · associations not trials · **no regulatory framework (Ch 16 §16.1's DSHEA structure arriving in a laboratory)**. ⚠️ **NEW §27.3b — WHY TWO LABS DISAGREE ABOUT ONE SAMPLE: DNA extraction method (gram-positives systematically under-detected by gent → Continuity Tracker — *Nutrition Science*
🟡 §21.8 lean mass
mechanism plausible (Ch 8 anabolic resistance + fewer stimulation events), trial evidence mixed, TREAT signal heavily criticized. **Fix is unambiguous: protein target inside the window + resistance training.** **🟠 §21.9 "resets metabolism"** — ⚠️ **but concede the real finding: short fasts do NOT lo → Continuity Tracker — *Nutrition Science*
🟢 Distribution across the day is genuinely useful
> roughly 0.3 g/kg across 3–5 meals beats the same total in one or two. **The urgency is not.** > > ⚠️ **The exception worth knowing:** **if you trained fasted, or have another session in under about > eight hours, then eating promptly matters** — **because you have a refuelling problem, not a synth → Nutrition Science: What the Evidence Actually Says About What to Eat
🟢 Probably true, and it is a real one
**a small share of food, with disproportionate emissions** | | ⚠️ **Organic farming has a lower environmental impact** | ⚠️ **🟡 Unclear / it depends.** **Lower per hectare on several measures, frequently HIGHER per unit of food because yields are lower.** **Which measure you choose determines the an → Nutrition Science: What the Evidence Actually Says About What to Eat
A
A boring diet has no novelty premium to lose
**nothing about it stops working when it stops being interesting** | | **4** | ⚠️ **And a boring diet is robust to being wrong about the details** — **which matters, because on the details this book has been wrong before and will be again** | → Nutrition Science: What the Evidence Actually Says About What to Eat
A category boundary lets you finish
you buy the organic > one, you check the non-GMO label, you eat the clean food, and the question is closed. **A dose > gradient never lets you finish**, which is cognitively expensive and commercially useless. > > **This is why presence beats dose in the marketplace even when dose is the truth**, an → Nutrition Science: What the Evidence Actually Says About What to Eat
A change in context
**moving, a new job, a new schedule, a household changing** (Ch 33 §33.8: habits are context-bound, which is why context change is both the risk and the opportunity). ⚠️ **A period of doing it unusually well** — **which raises the standard the resumption is measured against.** ⚠️ **And anything that → Nutrition Science: What the Evidence Actually Says About What to Eat
skin turgor (poor in older adults), mucous membranes, postural BP, heart rate, urine output, sodium, urea, osmolality. **No single marker is reliable alone**, which is worth remembering when a bottle offers you a colour chart. → Nutrition Science: What the Evidence Actually Says About What to Eat
Chapter 20's binary, arriving again. **And note the pattern: the item people most want policed is milk in coffee; the item that most obviously breaks the protocol is the 400 kcal butter coffee sold specifically to fasters.** §21.14. → Nutrition Science: What the Evidence Actually Says About What to Eat
around 3 g for solids in the EU | | **"Fat free" / "sugar free"** | ⚠️ **Essentially none** — around 0.5 g per 100 g | | **"Reduced X"** | ⚠️ **At least ~30% less than a comparable product** — **a COMPARISON, not a level** | | **"Source of fibre" / "high fibre"** | Around 3 g and 6 g per 100 g respe → Nutrition Science: What the Evidence Actually Says About What to Eat
a methodological critique of spot-urine estimation
reduces blood levels of many drugs, including **oral contraceptives** (contraceptive failure), **warfarin**, **immunosuppressants** (transplant rejection), some **antiretrovirals**, and some **chemotherapy agents**. **This is the single most dangerous common supplement interaction.** | | ⚠️ **Vitami → Nutrition Science: What the Evidence Actually Says About What to Eat
which is not 0.7 and not 1.0. You are not burning fat *or* carbohydrate. You are burning **both, continuously, in a ratio that shifts** with what you last ate, how hard you're working, and how long since your last meal. → Nutrition Science: What the Evidence Actually Says About What to Eat
not that *this product*, at *this dose*, in *this combination*, for *this outcome*, produced a positive result. It's Chapter 2's abstract-reading problem compressed into two words, and with a proprietary blend the dose is unknowable by design. → Nutrition Science: What the Evidence Actually Says About What to Eat
a mixture, roughly two-thirds fat. It implied there is no fuel switch, and §6.6 has now given you the mechanism: carbohydrate and fat both converge on acetyl-CoA and feed the same citric acid cycle, so there is nothing to switch *between*. The sliders just move. → Nutrition Science: What the Evidence Actually Says About What to Eat
the idea that protein metabolism produces acid, > which the body buffers by mobilizing calcium carbonate from bone. Supported by a real observation: > higher protein intake does increase urinary calcium excretion. > > **What the evidence actually shows:** The observation was real and the interpretat → Nutrition Science: What the Evidence Actually Says About What to Eat
Adam Drewnowski
energy cost and diet quality; the source of Chapter 32's central point. ⚠️ **Kent Berridge and Terry Robinson** — wanting versus liking; incentive salience. ⚠️ **Leann Birch** — development of children's food preferences; restriction and pressure. ⚠️ **Ellyn Satter** — the division of responsibility → Bibliography and Sources
Add protein to breakfast
eggs, yogurt, cottage cheese, milk in porridge, or last night's dinner 2. **Add a legume serving** to one meal — cheapest protein available 3. **Swap a low-protein snack** for a higher-protein one 4. **If you're over 65:** all of the above, plus find a way to do resistance training twice a week → Nutrition Science: What the Evidence Actually Says About What to Eat
roughly 10–20% more total protein — to offset lower digestibility and leucine density. 2. **Include soy** where acceptable — tofu, tempeh, edamame, soy milk — since it's among the highest- quality plant sources. 3. **Eat legumes in real quantity**, not as a garnish. 4. **Attend to B12**, which is no → Nutrition Science: What the Evidence Actually Says About What to Eat
ALA→EPA/DHA conversion is poor
worse for DHA, lower in men. ⚠️ **Cutting omega-6 does not reliably put EPA/DHA in your tissues. Eating fish does.** *(And note: the supplement trials are far more mixed than the food evidence — Ch 13, Ch 16, again.)* → Nutrition Science: What the Evidence Actually Says About What to Eat
and it's part of the reason they work, via satiety and reduced spontaneous intake. **Carnivore is the extreme exception at zero**, which §11.6's table makes concrete: the entire animal-food column contains no fiber. → Nutrition Science: What the Evidence Actually Says About What to Eat
**28**, 25, 30, 35, 37, App G · ⚠️ *the one absolute personalization* → Index
almost all of it is short-term
**excellent about a time trial next Tuesday, much thinner about a twenty-year career.** **Which is precisely why energy availability sits at the top: it's the one variable with strong long-term health evidence, and the one sacrificed for short-term performance.** → Nutrition Science: What the Evidence Actually Says About What to Eat
and this is the one clinicians miss — if the way they talk about food and their body suggests restriction, compensation, or distress, that's a [Chapter 34](../../part-06-practical-nutrition/chapter-34-eating-disorders/index.md) conversation, and "eat even less" may be a symptom rather than a plan. → Nutrition Science: What the Evidence Actually Says About What to Eat
so she needs a larger dose to produce the same effect. Meanwhile her appetite has fallen, her portions have shrunk, her taste has dulled, chewing is harder, and cooking for one is miserable. **Requirements up, intake down**, and nobody told her. → Nutrition Science: What the Evidence Actually Says About What to Eat
And "below the RDA" is not "deficient"
Chapter 13 §13.2's whole point. Frank magnesium deficiency with clinical signs is uncommon in healthy people, and is seen mainly with GI losses, alcohol use disorder, certain diuretics, PPIs, and poorly controlled diabetes. → Nutrition Science: What the Evidence Actually Says About What to Eat
And "unprecedented" is not the same as "harmful"
Chapter 17 §17.1's lost-golden-age tell > applies, and refrigeration, vaccination and iodized salt are also unprecedented. **But > "unprecedented" is an excellent reason to investigate**, and the people who noticed this first were > right to notice it. → Nutrition Science: What the Evidence Actually Says About What to Eat
**that never depended on it. When the factual claim collapsed it took the legitimate ones with it. THIS IS WHAT HAPPENS WHEN A VALUES POSITION BORROWS A SCIENTIFIC COSTUME.** **🟡 §20.11 glyphosate: IARC 2A (hazard) vs EFSA/EPA (risk) — third instance of this structure after Ch 17 BPA and Ch 18 aspar → Continuity Tracker — *Nutrition Science*
search **"nutritional screening impact clinical outcomes"**. **This is an uncomfortable literature: screening reliably identifies risk and the evidence that it changes outcomes is weaker than you would hope, largely because identification without a triggered action does nothing.** **§29.2's fourth p → Nutrition Science: What the Evidence Actually Says About What to Eat
the second clause was dropped. The "deficiency" claim compares intakes to the **RDA**, a figure explicitly set to exceed what 97–98% of people need. **In both cases the number is real and the framing around it was removed.** → Nutrition Science: What the Evidence Actually Says About What to Eat
And the answer that industry converged on
⚠️ **energy-dense, soft, fast to eat, engineered for > palatability, cheap per calorie, portioned generously** — **turns out to describe food that people > eat more of.** > > **That's the claim. It is a claim about intake, not about toxicity** — and §22.3 is where it was > tested. → Nutrition Science: What the Evidence Actually Says About What to Eat
And the confounding is symmetric
it prevents the cohorts from indicting seed oils **and** from exonerating them, because "diet quality" adjustments are partly measuring seed oil intake. **This is why the epidemiology cannot settle this debate and probably never will.** §19.11. → Nutrition Science: What the Evidence Actually Says About What to Eat
And the elimination frequently helps, at first
⚠️ **because removing twenty-three foods removes most ultra-processed food, most alcohol, most eating out, and usually several genuine FODMAP triggers** (Chapter 17's bundled intervention, Chapter 22's slot problem). → Nutrition Science: What the Evidence Actually Says About What to Eat
the genes didn't change in fifty years. > > **Genetics explains why, in the same food environment, some people gain and others don't. Environment > explains why nearly everyone gained more than their grandparents.** > > ⚠️ **The two answers are not competitors. They answer different questions**, and → Nutrition Science: What the Evidence Actually Says About What to Eat
large, fast, can persist months to years | |---|---| | **2** | **Long-term dietary pattern** | | **3** | Early-life factors | | **4** | Geography and household | | **5** | ⚠️ **Other medications — PPIs, metformin, antipsychotics. Vastly under-appreciated** | | **6** | Age | | **7** | Short-term diet → Nutrition Science: What the Evidence Actually Says About What to Eat
Antioxidant supplements
**13**, 2, 37 §37.2b, App H · ⚠️ *🟠, and some caused harm* → Index
Antioxidant supplements for disease prevention
**and some caused harm** | **2, 13** | | ⚠️ **Vitamin E supplementation** | **13** | | ⚠️ **BCAAs when total protein is adequate** | **23** | | ⚠️ **Glutamine for the general population** | **23** | | ⚠️ **"Testosterone boosters"** | **16** | | ⚠️ **Most "immune support" formulations** | **16** | | → Appendix H — Supplement Evidence Grades
any cuisine
this chapter is deliberately, explicitly not built around a Mediterranean default, because rice, tortillas, injera, cassava, plantain, noodles, and beans are food, not compromises. Batch strategy. Grocery navigation. Eating out. This is Yolanda's chapter, and she is better at this than I am. → Nutrition Science: What the Evidence Actually Says About What to Eat
growth is at stake and a child cannot consent to a nutritional experiment. **Any diet undertaken by someone with a history of disordered eating** — restriction is both the intervention and the illness (Ch 34). → Nutrition Science: What the Evidence Actually Says About What to Eat
the "anorexia of ageing," genuinely physiological - **Taste and smell dull**, making food less rewarding - **Chewing gets harder** — dentition, dry mouth, ill-fitting dentures. Meat is the hardest food to chew and the highest-protein one. - **Cooking for one is miserable** and shopping is harder - * → Nutrition Science: What the Evidence Actually Says About What to Eat
⚠️ **Avoidant/Restrictive Food Intake Disorder. Restriction driven by sensory factors, fear of aversive consequences, or low interest — WITHOUT a body-image component.** *(Ch 34)* → Appendix I — Glossary
arms and legs
> forty percent of your actual mass — would shrink to thin lines, because at rest muscle costs almost > nothing. The **adipose tissue** would be barely visible. > > That grotesque figure is your metabolism. **It is mostly a brain and a liver, kept alive by a heart > and kidneys, being carried around → Nutrition Science: What the Evidence Actually Says About What to Eat
Around 6 months
**when the infant can sit with support, has head control, and shows interest.** Not before 4 months | | ⚠️ **Why then** | ⚠️ **Iron stores laid down in utero deplete around this point**, and milk alone no longer supplies enough (Chapter 14) | | **First foods** | ⚠️ **Iron-rich foods matter most** — → Nutrition Science: What the Evidence Actually Says About What to Eat
8 minutes | | **4th** | **Wed** | ⚠️ **Assembly, single portion, from Sunday** — his partner is out | | **5th** | **Tue, Thu** | Repertoire meals | | **6th** | **Sat** | ⚠️ **THE NEW RECIPE — high capacity, no time pressure, and he wants to** | → Nutrition Science: What the Evidence Actually Says About What to Eat
adherence drifts, so by twelve months the groups' actual intakes are much closer than their assignments. (2) **Dropout is large (20–40%) and non-random** — the people doing worst leave, inflating every arm and compressing differences. (3) **Every reasonable diet removes the same foods** — whatever t → Nutrition Science: What the Evidence Actually Says About What to Eat
Asthma, particularly poorly controlled
**by some distance the most important** - ⚠️ **Adolescence and young adulthood** — **risk-taking, not carrying the device, eating out** - **Peanut and tree nut allergy** - ⚠️ **Delayed adrenaline administration** - **Being upright or standing during the reaction** → Nutrition Science: What the Evidence Actually Says About What to Eat
4/4/9/7 kcal per gram for carbohydrate, protein, fat, alcohol — which are already adjusted downward from gross energy to approximate *metabolizable* energy. And as §3.9 established, they're category averages applied to specific foods, with real error. → Nutrition Science: What the Evidence Actually Says About What to Eat
Autism and eating disorders
⚠️ **including the over-representation in anorexia nervosa and ARFID, and the growing literature on adapting treatment rather than delivering it unmodified.** ⚠️ **The autistic-authored material in this area is worth seeking out specifically.** → Nutrition Science: What the Evidence Actually Says About What to Eat
Autophagy
literally "self-eating" — is the cellular recycling process AMPK promotes: damaged proteins and organelles are broken down and their components reused. It's genuinely important biology, and the researchers who worked it out won a Nobel Prize for it. → Nutrition Science: What the Evidence Actually Says About What to Eat
often preserves more than boiling | | Non-stick pans poison you | 🟡 ⚠️ PFAS genuinely matter; **intact pans at normal temperatures mostly don't** | | Plastics leach hormone disruptors | 🟡 **A live regulatory disagreement** — EFSA and FDA differ materially | | **Cooked tomatoes beat raw for lycopene* → Nutrition Science: What the Evidence Actually Says About What to Eat
Bacterial insecticide
*see §20.9 for the irony* | > | **Neem / azadirachtin** | Insecticide | > | **Horticultural oils, soaps** | Various | > > ⚠️ *(Rotenone, a botanical insecticide once widely used in organic production, has been withdrawn or > restricted in many jurisdictions on toxicity grounds — which is a useful de → Nutrition Science: What the Evidence Actually Says About What to Eat
Bad-night plan
**31 §31.11**, 33 §33.4, 37, 38, App F · ⚠️ *a cue intervention, not a nutritional one* → Index
balance scale
food on one > pan, activity on the other. Throw that picture away. It's wrong in the specific way that matters: > the two pans are drawn as independent. > > Replace it with a **thermostat controlling a room**. The room's temperature is your body's energy > stores. The heater is intake. The open wind → Nutrition Science: What the Evidence Actually Says About What to Eat
🟠 **for anyone eating adequate total protein; you are buying three amino acids you already have.** · **Glutamine** — 🟠 · **HMB** — 🟡 **in untrained or heavily-restricted contexts; 🟠 in trained athletes** · **"Testosterone boosters"** — ❌ (Chapter 16) · **Ketone esters** — ⚗️ **genuinely unresolved, → Nutrition Science: What the Evidence Actually Says About What to Eat
⚠️ **on the cognitive load imposed by managing under constraint.** ⚠️ **Read this one critically: it is often cited to explain low-income decision-making and can slide into exactly the competence assumption §32.11 warns about.** **The load is real; it is not the whole explanation and it is not a sub → Nutrition Science: What the Evidence Actually Says About What to Eat
Berberine
not stopped unilaterally by me, because that's a prescriber's conversation, and because stopping a glucose-lowering agent has consequences too | | **Added** | **Fiber ramp: 14 → 30 g over six weeks.** Oats replacing toast · tinned beans into two dinners · a pear as the afternoon thing he does anyway → Nutrition Science: What the Evidence Actually Says About What to Eat
⚠️ **Recurrent episodes of eating experienced as out of control, with marked distress, without regular compensatory behaviour.** ⚠️ **The most common eating disorder.** *(Ch 34)* → Appendix I — Glossary
Bioavailability
⚠️ **The proportion of an ingested nutrient actually absorbed and usable.** ⚠️ **Why non-haem iron and haem iron are not interchangeable.** *(Ch 14)* → Appendix I — Glossary
Biotin 3,000 µg
immunoassay interference, which nearly cost him a cardiac diagnosis. And **zinc 50 mg** — above the ~40 mg UL, sustained, risking **copper deficiency** with anemia, neutropenia and potentially irreversible neurological damage. **One hazard was diagnostic, one nutritional, and neither was on any medi → Nutrition Science: What the Evidence Actually Says About What to Eat
Biotin and lab assays
**16**, App H · ⚠️ *Walt's ER visit at 04:32* → Index
a real, FDA-documented interference (FDA safety communication, 2017, updated 2019). His "immune blend" nearly cost him a correct diagnosis of a cardiac event. Also: his → Continuity Tracker — *Nutrition Science*
blinded fluid
administration
intravenous or nasogastric — to separate the sensation of drinking from the fluid itself. Also look for field analyses of **body mass loss versus finishing position** in endurance events, where the fastest finishers are frequently the most dehydrated. → Nutrition Science: What the Evidence Actually Says About What to Eat
Blinding is the core problem
a > participant who has been deprived of water and knows it is not a clean comparison, and expectancy > effects on subjective mood measures are exactly what you'd expect. Severe dehydration unambiguously > impairs cognition; the mild end is much less clear. > > 📉 **Evidence quality:** Numerous small → Nutrition Science: What the Evidence Actually Says About What to Eat
Blood glucose fell immediately
before meaningful weight loss. **This is the liver responding, not the fat coming off** | | **2** | Blood pressure down; ⚠️ **BP medication reduced** | | **3** | ⚠️ **Triglycerides 2.6 → 1.4 mmol/L** | | **8** | ⚠️ **ALT 61 → 34 U/L** — liver fat, the fastest structural change available | | **12** | → Nutrition Science: What the Evidence Actually Says About What to Eat
basal metabolic rate | Energy to keep you alive at complete rest, in a thermoneutral room, after 12+ hours fasting, having not moved since waking | Strict laboratory conditions; rarely measured in practice | | **RMR** — resting metabolic rate | The same idea, measured under realistic conditions | In → Nutrition Science: What the Evidence Actually Says About What to Eat
body protein
and since there is no protein store (§6.2), that means functional > tissue: muscle, and eventually organ protein. > > **This is why protein intake rises in importance as carbohydrate falls**, and it's the mechanistic > reason very-low-carbohydrate diets emphasize protein. It's also why prolonged fas → Nutrition Science: What the Evidence Actually Says About What to Eat
and it is not > symmetric. > > A finding that is pleasant, actionable, counterintuitive and commercially supported propagates > extremely well. **Its correction is unpleasant, less actionable, commercially unsupported, and > arrives as a retraction** — which is the least shareable format in existenc → Nutrition Science: What the Evidence Actually Says About What to Eat
a tough multi-layered husk, mostly fiber, carrying most of the grain's > B vitamins, minerals, and antioxidants. Inside that, occupying the great bulk of the grain, the > **endosperm** — a dense white starch store, the seed's packed lunch for germination, with some > protein and very little else. An → Nutrition Science: What the Evidence Actually Says About What to Eat
a daily handful is genuinely inadvisable. | | **Iodine** | See below — the victory and the returning problem. | | **Potassium** | AI ~2,600–3,400 mg; **most people get half to two-thirds.** Lowers BP. ⚠️ Supplements and potassium salt substitutes are **dangerous** in kidney disease or on ACE inhibit → Nutrition Science: What the Evidence Actually Says About What to Eat
Bread, beer, wine and vinegar pickles do not count
wheat bran, or psyllium, plus fluid. Inulin > will mostly give you wind. > > If you want to **feed your microbiome**, you want **fermentable** fiber and variety — and gas is the > byproduct of the thing working, not evidence that it isn't. > > **"Fiber" on a label tells you a grams number and nothin → Nutrition Science: What the Evidence Actually Says About What to Eat
for flavour, for baking, on toast, in the quantities a person actually uses. The saturated fat objection to it is real, modest, and comparator-dependent, and if the alternative is a low-fat spread eaten alongside more refined carbohydrate, it isn't an improvement. → Nutrition Science: What the Evidence Actually Says About What to Eat
Chapter 21 Case Study 1's compensation curve. **The rule: if the scale hasn't moved in two weeks, measure intake before changing anything.** *(The other two: expenditure has fallen, and water/glycogen masking — Chapter 4 §4.8's weight-is-not-fat point.)* §24.8b. → Nutrition Science: What the Evidence Actually Says About What to Eat
C
Caffeine
**16**, 23, 33 §33.11, 35 §35.3, App H · ⚠️ *🟢 ergogenic* → Index
Calcium from food
and remember protein + resistance training do more for fractures. 5. ⚠️ **Check your salt is iodized, or that your prenatal contains iodine.** 6. **Eat more potassium** — potatoes, beans, greens, yogurt. 7. **Reduce sodium if you have high blood pressure.** Cooking your own food does more than the s → Nutrition Science: What the Evidence Actually Says About What to Eat
the change she felt fastest | | **Total intake** | ~2,280 → **~3,050 kcal** | | **Protein** | **1.1 → 1.7 g/kg**, distributed | | **Estimated EA** | ⚠️ **~26 → ~42** | | **Training** | **Reduced for six weeks** while intake came up — ⚠️ **EA has two terms and only one of them is food** | | **Referra → Nutrition Science: What the Evidence Actually Says About What to Eat
Carbohydrates
Sugars, starches, and fiber; simple versus complex (a mostly useless distinction) versus intact versus refined (a useful one); glycemic index and glycemic load and why both are weaker predictors than advertised; resistant starch; how many carbohydrates a human actually requires (a surprising answer) → Book Outline
remember that, because it's about to matter.)* 3. **Beta-oxidation.** Inside the mitochondrion, the long fatty acid chain is chopped, two carbons at a time, into **acetyl-CoA** units. 4. Those acetyl-CoA units enter the citric acid cycle, exactly as pyruvate's do. → Nutrition Science: What the Evidence Actually Says About What to Eat
you carry almost none. Your entire body's ATP stock would fuel a few seconds of hard effort. It's spent and regenerated continuously, thousands of times a day. You don't store energy as ATP for the same reason you don't keep your life savings in your pocket. - **Current account (glycogen)** — access → Nutrition Science: What the Evidence Actually Says About What to Eat
Cash flow vs income
**32 §32.1**, 36, App F · ⚠️ *the most under-stated fact in budget-food advice* → Index
Creative Commons Attribution-ShareAlike 4.0 International. Copy it, print it, teach from it, translate it, remix it. Share alike, and credit the source. See `LICENSE`. → Nutrition Science
Celery is a perfectly good vegetable
water, some fiber (mostly > removed by juicing), potassium, vitamin K, some phytochemicals. > > **And people do report feeling better**, which by now you can decompose without help: they've added a > morning routine, increased vegetable intake, often replaced a sugary drink, are drinking more fluid, → Nutrition Science: What the Evidence Actually Says About What to Eat
drugs that raised HDL substantially and failed to reduce cardiovascular events, in some cases increasing harm. This is the cleanest demonstration available that HDL is a marker rather than a lever, and it cost billions to establish. → Nutrition Science: What the Evidence Actually Says About What to Eat
CGM (glucose monitors)
**35 §35.5**, 26, 35 CS1, 37 CS2 · ⚠️ *🟡 in non-diabetic people* → Index
Ch 1
Why Nutrition Is Confusing | Names the problem you already feel | | 2 | **Ch 2** — How to Read Nutrition Research 🚪 | The whole game | | 3 | **Ch 4** — Energy Balance 🚪 | Ends the loudest false dichotomy | | 4 | **Ch 10** — The Diet Wars 🚪 | Answers "which diet?" honestly | | 5 | **Ch 11** — Fiber | → Learning Paths
**the Belief Inventory. Everyone writes ten beliefs and rates confidence BEFORE reading.** ⚠️ **Ch 20** — **organic and GMO. Genuine values disagreement; hold everyone to the same evidence standard.** ⚠️ **Ch 24** — **weight. Expect anger, and it is a reasonable response to the history.** ⚠️ **Ch 32 → Syllabus — Self-Paced
Ch 2
*is the evidence any good?* **· Ch 10** — *is this the right argument?* **· Ch 18** — *what is the dose?* **· Ch 33** — *is this even a food problem?* → Syllabus — Self-Paced
Ch 28 owns this.
**Alma**, 4. **Diagnosed peanut allergy** (clinically confirmed, epinephrine auto-injector) and a genuinely picky eater. She is the contrast case: *a real, testable, potentially fatal food allergy next to her brother's real-but-not-allergic symptoms.* **Ch 28 owns this.** - **Household budget: $180/ → Continuity Tracker — *Nutrition Science*
Ch 29 is also the
VERDICT RE-AUDIT point.
**(Ch 29 done)** ★ **PART V CLOSES.** 🪞 **Learning Check-In delivered (predict the critical-care trial results BEFORE §29.8).** ⚠️ **VERDICT RE-AUDIT DELIVERED in §29.16 — see below.** ⚠️ **HOOK: IVOR PETRAKIS'S NINE DAYS.** 80 now, fractured neck of femur, **~350 kcal/day for nine days (~3,150 tota → Continuity Tracker — *Nutrition Science*
Change the environment, not the resolve
*"none in the house on weeknights"* 3. **Break the cue** — most habitual drinking is cue-driven; the cue is the intervention point 4. **Alcohol-free substitutes** preserve the ritual, which is often what's being defended 5. **Track it for two weeks** — the count itself reduces intake 6. **Reduction → Nutrition Science: What the Evidence Actually Says About What to Eat
and recent large-scale work suggests total energy expenditure adjusted for body composition is remarkably stable from about the twenties to about sixty. - ⚠️ **What changes is body composition, activity, and circumstances** — **lean mass falls without resistance training, activity typically falls wi → Nutrition Science: What the Evidence Actually Says About What to Eat
a bowl | ⚠️ **8 min** | | **Tue** | ⚠️ **Lentils, roasted veg, vinaigrette, feta** — a warm salad | **6 min** | | **Wed** | **Chicken and slaw in a wrap, with chilli sauce** | ⚠️ **5 min** | | **Thu** | ⚠️ **Lentil and tomato pasta** *(lentils + a tin + pasta cooked fresh)* | **15 min** | | **Fri** → Nutrition Science: What the Evidence Actually Says About What to Eat
**33 §33.6b**, 25 §25.6, 34, App G · ⚠️ *restriction and pressure backfire in opposite directions* → Index
Cholesterol, dietary
**9**, 37 §37.2b · ⚠️ *guidance withdrawn* → Index
Christopher Fairburn's work on CBT-E
⚠️ **including *Cognitive Behavior Therapy and Eating Disorders*, and his *Overcoming Binge Eating* for a general readership.** **⚠️ The latter is one of the few self-help books in this area with genuine trial support, and is widely used as guided self-help.** → Nutrition Science: What the Evidence Actually Says About What to Eat
on a six-level scale that includes "unclear," "untested," and "well supported," not just "debunked." Because the honest answer is often that we don't know, and a book that can admit that earns the right to be believed when it says we do. → Nutrition Science
clear dose-response relationship
more fiber, better outcomes, across the observed range. - The greatest reductions were seen at intakes of roughly **25–29 g/day**, and the curves suggested **benefit continuing above that**. - Trial data supported reductions in body weight, blood pressure, and total cholesterol. → Nutrition Science: What the Evidence Actually Says About What to Eat
⚠️ **An autoimmune condition triggered by gluten. ⚠️ TEST BEFORE REMOVING GLUTEN — diagnosis requires gluten in the diet.** *(Ch 28)* → Appendix I — Glossary
Common, and partly produced by malnutrition
**which is why mood is reassessed after nutritional restoration rather than only before it** | | ⚠️ **Trauma history** | ⚠️ **Over-represented, particularly in bulimia nervosa and binge eating disorder.** **Where present, it usually has to be part of the treatment rather than an afterthought** | | ⚠ → Nutrition Science: What the Evidence Actually Says About What to Eat
commonly cause bloating, and they ARE the FODMAPs.
Chapter 2, arriving on cue. - **It does not show that everyone responds identically.** Gastric emptying rate, glycemic response, and satiety signalling vary substantially between people, and [Chapter 35](../../part-06-practical-nutrition/chapter-35-personalized-nutrition/index.md) examines whether w → Nutrition Science: What the Evidence Actually Says About What to Eat
every dietary change is a substitution, never a deletion 2. **In whom?** — mice? twelve men in a metabolic ward? a population unlike you? 3. **How was diet measured?** — if it's a questionnaire in a cohort, it's a hypothesis 4. **Who benefits if I believe this?** — asked in *every* direction, includ → Nutrition Science: What the Evidence Actually Says About What to Eat
comparison of habitual intakes
people who eat more saturated fat versus people who eat > less, with whatever they actually ate instead, which in most Western cohorts across those decades > was substantially refined carbohydrate. > > Both findings can be true simultaneously, and both are. **The apparent contradiction exists only > → Nutrition Science: What the Evidence Actually Says About What to Eat
see healthy-user bias. | | 6 | **Randomized controlled trial (RCT)** | Causation, but usually short, small, on surrogate endpoints, in unrepresentative people. | | 7 | **Meta-analysis / systematic review of RCTs** | Strongest — *if* the underlying trials are good. Garbage in, garbage out. | | 8 | ** → Continuity Tracker — *Nutrition Science*
Confounding
⚠️ **When a third factor explains an observed association.** ⚠️ **The permanent problem of nutritional epidemiology.** *(Ch 2)* → Appendix I — Glossary
assembled from the recurring features of the genre rather than copied from any real account. ⚠️ **It is not a real post and no real person is being described.** The pipeline dynamics, the tells, and the over-extension mechanism are the parts that are real.* → Nutrition Science: What the Evidence Actually Says About What to Eat
the Walt problem | | **Calcium** | Iron and zinc, in the same meal | | **Iron** | Zinc, at supplemental doses | | **Phytate** | Iron, zinc, calcium — *reduced by soaking, sprouting, fermenting, leavening* | | **Tea/coffee polyphenols** | **Non-heme iron** — large effect | → Nutrition Science: What the Evidence Actually Says About What to Eat
**33 §33.9** · ⚠️ *❌ nutrient-specific, except sodium* → Index
Creatine
**16**, 23, App H · ⚠️ *✅, the best-evidenced sports supplement* → Index
creatinine
a kidney marker — is a laboratory artefact > of creatine metabolism, **not evidence of kidney injury**, though it will confuse a clinician who > doesn't know you take it. *(Which is §16.7's theme again.)* > > **There is also a growing and genuinely interesting literature on cognitive effects**, part → Nutrition Science: What the Evidence Actually Says About What to Eat
Cue vs interval diagnostic
**33 §33.3**, 37 §37.7, 38, App D · ⚠️ *"what started this?"* → Index
partly from the iodine content of feed, and partly from **iodine-containing disinfectants used in milking equipment**, residues of which enter the milk. It's an accidental fortification and it has been quietly doing real work. → Nutrition Science: What the Evidence Actually Says About What to Eat
DASH and DASH-Sodium
search **"DASH trial blood pressure controlled feeding"** and **"DASH-Sodium trial."** ⚠️ **Note that these are controlled feeding studies, which is why the effect sizes are clean and why translating them to free-living advice loses some of it.** → Nutrition Science: What the Evidence Actually Says About What to Eat
DASH-Sodium
a controlled feeding trial — demonstrated clear, dose-dependent blood pressure reductions with sodium reduction, with larger effects in people with higher baseline blood pressure and in the DASH dietary pattern. → Nutrition Science: What the Evidence Actually Says About What to Eat
if performance matters to them, it may not be the right tool, and it has no metabolic advantage to trade against that cost (Chapter 10). (4) **Put the ketone meter away.** It's measuring something real and irrelevant to their goal, and it's giving them false confirmation that things are working. → Nutrition Science: What the Evidence Actually Says About What to Eat
*"what else changed?"* · **concede the true part first, and mean it** · ⚠️ **never make it about intelligence** — **Theo has a folder, two highlighters, and eight of ten wrong** · **and expect to fail, while leaving a marker.** → Nutrition Science: What the Evidence Actually Says About What to Eat
Defaults beat decisions
**33 §33.4**, 36 §36.7 · ⚠️ *the same finding from two directions* → Index
so that when someone tells you next month that seed oils are poisoning you, or that you need a $200 microbiome test, or that a specific fasting window will change your life, you don't have to consult a book or an expert or me. → Nutrition Science: What the Evidence Actually Says About What to Eat
Define the outcome BEFORE you start
**otherwise you will find something** | | **3** | ⚠️ **Alternate the condition repeatedly** — **ABAB, not A-then-B.** **A single switch is confounded with everything else that changed that month** | | **4** | ⚠️ **Run each block long enough for the effect to appear and wash out** | | **5** | ⚠️ **Bl → Nutrition Science: What the Evidence Actually Says About What to Eat
dehydration and endurance performance
particularly studies using blinded fluid administration, and field studies of finishing times versus body mass loss. Where does the disagreement sit? Search for the exchange between proponents of prescribed drinking and of drinking to thirst. → Nutrition Science: What the Evidence Actually Says About What to Eat
deliberately REMOVED
replaced with a boxed note that energy-availability thresholds function as targets and the figures stay in Ch 15). **Content notes on FIVE files** (index, both case studies, exercises, quiz — one more than required). **§34.14 signposted 6× in the index and reproduced at the TOP of `key-takeaways.md` → Continuity Tracker — *Nutrition Science*
but **conversion is poor**: commonly estimated at something like 5–10% for EPA and under 1–5% for DHA, varying with sex, genetics and background diet. Which is why oily fish, which supplies EPA and DHA directly, is treated as a separate recommendation from ALA-rich plants. → Nutrition Science: What the Evidence Actually Says About What to Eat
**35 §35.3b**, 37 CS1 · ⚠️ *pre-specified and falsified* → Index
different analysis
a critique by Yerushalmy and Hilleboe using available international food-supply and mortality statistics, which showed a weaker association than Keys's data suggested. Keys's Seven Countries Study was a separately designed prospective cohort, and the countries were chosen for practical and methodolo → Nutrition Science: What the Evidence Actually Says About What to Eat
Different change schedules
fish fryer more often, chip fryer less | ⚠️ **Roughly net neutral** | | **Filter both fryers nightly** *(he did it "most nights")* | £0 — he owned the filter | | **Skim particulates between services** | £0 | | **Lid on overnight**, fryers off rather than idling | ⚠️ **Saved energy** | | **Lower idle → Nutrition Science: What the Evidence Actually Says About What to Eat
different fiber, not less fiber
viscous, less-fermentable options like psyllium are often well tolerated while highly fermentable ones (inulin, large legume servings, wheat fructans) drive symptoms. A supervised, **temporary** low-FODMAP approach with structured reintroduction may help identify triggers. → Nutrition Science: What the Evidence Actually Says About What to Eat
written as a different problem, not a budget version of Ch 31. **Opens with a CURRENCY CONVENTION stated once** (prices in the currency of the household described; **the RATIOS transfer, not the figures**) — this resolves the book's standing $/£ mix and **later chapters should honour it**. Hook = Ma → Continuity Tracker — *Nutrition Science*
Disinhibition
⚠️ **A breach of restraint, typically cue- or stress-triggered. Step 4 of Chapter 33's cycle.** *(Ch 33)* → Appendix I — Glossary
Distinguish provenance claims from quantity claims
⚠️ **another stale-guidance case.** **Avoiding nuts, seeds and popcorn was standard advice for decades, on the theory that particles lodged in diverticula.** **When it was examined, no association was found, and the guidance was reversed.** ⚠️ **Many people are still following it.** **Fibre is assoc → Nutrition Science: What the Evidence Actually Says About What to Eat
Do not eliminate anything yet
Nico's family is the cautionary tale, and Chapter 28 explains why testing precedes elimination. - Is there a time of day when your eating is driven by something other than hunger? No action required. Just notice. → Nutrition Science: What the Evidence Actually Says About What to Eat
one of Chapter 2 §2.10's markers of a finding worth taking seriously. Trial evidence on intermediate outcomes (LDL cholesterol, inflammatory markers, glycemic measures) generally points the same direction. And there's a plausible mechanism: fiber, resistant starch, micronutrients, and the food-matri → Nutrition Science: What the Evidence Actually Says About What to Eat
a registered dietitian with a doctorate in nutritional biochemistry who splits her week between a hospital outpatient clinic and a university research group, and who is **visibly exhausted by Instagram nutrition advice**. She is warm with people and merciless with claims. She has counseled thousands → Continuity Tracker — *Nutrition Science*
sufficient for healthy adults in ordinary conditions. 2. **Check urine colour occasionally.** ⚠️ Riboflavin confounds it. 3. **Don't count glasses.** 4. **Drink deliberately when the situation demands it** — heat, exercise, illness, altitude, or if you're an older adult. 5. **If you train, measure y → Nutrition Science: What the Evidence Actually Says About What to Eat
DSHEA (1994)
the law that created the modern supplement market · FDA biotin-assay-interference safety communication (2017, updated 2019) · **Cochrane** reviews · **WHO** guidelines (free sugars, sodium, trans fat, red/processed meat) · **IARC** carcinogen classifications (Group 1: processed meat, alcohol; Group → Continuity Tracker — *Nutrition Science*
on the order of several percent, which for a week-long cold is a matter > of hours. Starting vitamin C *after* symptoms begin generally shows no benefit. > > **The interesting exception:** in people undergoing extreme short-term physical stress — marathon > runners, soldiers in subarctic conditions → Nutrition Science: What the Evidence Actually Says About What to Eat
E
EAR
Estimated Average Requirement | The intake meeting the needs of **50%** of a group | Assessing **populations**, not people | | **RDA** — Recommended Dietary Allowance | The intake meeting the needs of **97–98%** of healthy individuals | A target for an individual | | **AI** — Adequate Intake | Used → Nutrition Science: What the Evidence Actually Says About What to Eat
early time-restricted feeding
a roughly 6-hour window with dinner finished by mid-afternoon — **in men with prediabetes, under eucaloric conditions (weight held stable), in a crossover design.** ⚠️ **It reported improved insulin sensitivity, blood pressure and oxidative stress markers, without weight loss.** → Nutrition Science: What the Evidence Actually Says About What to Eat
eat carbohydrate that still has its structure
captures most of the same > benefit with none of the lookup tables. > > 📉 **Evidence quality:** Rung 6 for the measurement; rung 5–6 and mixed for low-GI diets on hard > outcomes. > > **Verdict: 🟡 Unclear / it depends.** Genuinely useful in clinical diabetes care and research; a poor > everyday orga → Nutrition Science: What the Evidence Actually Says About What to Eat
Eaten FIRST.
**Resistance training twice weekly**, starting supervised because of the knee. - ⚠️ **Fibre and fluid deliberately** — the constipation was making her eat less still. - **Micronutrient review** — ⚠️ **when total intake halves, everything in it halves** (Chapters 13, 14). - **A protein-first meal str → Nutrition Science: What the Evidence Actually Says About What to Eat
Eating disorders
**34**, 33 §33.6, 37 §37.10, App G · ⚠️ *§34.14 for help* → Index
Eating well on a genuinely constrained budget
not as a lifestyle choice, and not by shopping at farmers' markets. **What food actually costs per calorie, per gram of protein, and per unit of fibre. Why cheap food is energy-dense, and what that does to Chapter 22's argument.** Food deserts and food swamps. Time as a currency. **The cost of a sma → Nutrition Science: What the Evidence Actually Says About What to Eat
canola, corn, cottonseed, soybean, sunflower, safflower, grapeseed, > rice bran > 2. **Read every label.** If it's in there, it's out > 3. **Cook with butter, ghee, tallow, coconut oil or olive oil only** > 4. **No restaurant food unless you can confirm the cooking fat** > 5. **Eat as much as you wa → Nutrition Science: What the Evidence Actually Says About What to Eat
Ellyn Satter's division of responsibility
⚠️ **the practical framework.** **Widely used clinically; ⚠️ note that its evidence base is weaker than its adoption, and that its core claim converges with Birch's experimental findings, which is the reason to take it seriously.** → Nutrition Science: What the Evidence Actually Says About What to Eat
Emulsifiers
compounds like **carboxymethylcellulose** and **polysorbate-80** — are used to keep formulations stable. **Rodent work by Chassaing, Gewirtz and colleagues found that these compounds altered gut microbiota composition and promoted intestinal inflammation and metabolic changes in mice.** → Nutrition Science: What the Evidence Actually Says About What to Eat
especially female | Foot-strike hemolysis, GI losses, sweat, inflammation-driven hepcidin, and high demand | | **Vegetarians and vegans** | Non-heme only, plus phytate; requirements are often cited as roughly 1.8× higher | | **Pregnancy** | Substantially increased requirement | | **Infants and toddl → Nutrition Science: What the Evidence Actually Says About What to Eat
Energy availability
**15**, 23, **34 §34.6** · ⚠️ *figures deliberately not repeated in Ch 34* → Index
the accounting identity (Ch 4 §4.2). They differ in the *mechanism by which they get you there*: appetite suppression, food elimination, satiety, decision reduction. **Composition is a delivery mechanism, not an alternative to energy balance.** → Nutrition Science: What the Evidence Actually Says About What to Eat
Energy density
⚠️ **Calories per unit weight, usually kcal/100 g. Printed on European labels and one of the most useful numbers there.** *(Ch 22, 30)* → Appendix I — Glossary
Energy surplus
Theo is +490 kcal/day - **Alcohol** — 27 g ethanol daily; alcohol raises triglycerides reliably and dose-dependently (Chapter 12) - **Refined carbohydrate and fructose** — which drive hepatic triglyceride synthesis (Chapter 18) - **Adiposity and insulin resistance** — the underlying driver → Nutrition Science: What the Evidence Actually Says About What to Eat
enteric nervous
system
comprising a very large number of neurons embedded in the gut wall. It can coordinate motility, secretion, and local blood flow **without input from the brain**, which is unusual and genuinely remarkable. Nothing else in your body operates with that degree of autonomy. → Nutrition Science: What the Evidence Actually Says About What to Eat
Environmental impact
**36 §36.3**, 36 §36.3b, 37 · ⚠️ *find the denominator first* → Index
protein, fiber, micronutrients, low UPF. Anything failing this is disqualified regardless of its story. 2. **Ask the adherence questions:** Would I still be doing this in a year? Does it survive a bad week? Can I eat with other people? Can I afford it, in money and time? Does it require me to become → Nutrition Science: What the Evidence Actually Says About What to Eat
Established circadian findings:
⚠️ **Glucose tolerance is generally better in the morning and declines across the day.** The same meal produces a larger glucose excursion in the evening than at breakfast. - **Insulin sensitivity follows a daily rhythm.** - **Melatonin onset in the evening is associated with impaired glucose handli → Nutrition Science: What the Evidence Actually Says About What to Eat
euglycemic DKA
ketoacidosis with normal > blood glucose, which is easy to miss — and should not begin very-low-carbohydrate diets without > medical guidance. Pregnancy, breastfeeding, kidney disease, liver disease, a history of eating > disorders, and pancreatitis are all situations where ketogenic diets need medi → Nutrition Science: What the Evidence Actually Says About What to Eat
and people defend identities far more vigorously than they defend hypotheses. This is Chapter 1 §1.6's myth shapes operating at full strength: *restriction as virtue*, *purity and contamination*, *the suppressed truth*. → Nutrition Science: What the Evidence Actually Says About What to Eat
Examine.com
an independent, subscription-based database summarizing the human evidence for individual supplements, graded and referenced. It is the most useful single resource for looking up something not covered in this book, and it is generally careful about distinguishing mechanism from outcome. → Nutrition Science: What the Evidence Actually Says About What to Eat
excellent trial evidence
the DASH and DASH-Sodium trials produced substantial blood pressure reductions, and it's one of the best-evidenced dietary patterns in existence. High in vegetables, fruit, whole grains, legumes, low-fat dairy; low in sodium, sweets, red meat. It looks a great deal like the Mediterranean pattern wit → Nutrition Science: What the Evidence Actually Says About What to Eat
Exercise-associated hyponatremia
dilutional low sodium caused by drinking more fluid than she lost. She was treated, observed, and went home the same evening, and she was lucky, because the severe form of this causes seizures, cerebral oedema, and has killed people. → Nutrition Science: What the Evidence Actually Says About What to Eat
**the beta-carotene template** (Ch 2, Ch 13) | | ⚠️ **Margarine is healthier than butter** | ⚠️ **FAILED as formulated** — **industrial trans fat, now near-eliminated** (Ch 19, Ch 36) | | ⚠️ **Eat for your blood type** | ⚠️ **FAILED. Tested directly and refuted** (Ch 35) | | ⚠️ **Carbohydrate drives → Nutrition Science: What the Evidence Actually Says About What to Eat
for *causal* evidence. The cohort is better for hard outcomes over real timescales, but randomization is what breaks confounding, and no amount of size or duration substitutes for it. The two answer different questions, which is exactly why convergence between them matters so much. → Nutrition Science: What the Evidence Actually Says About What to Eat
**and this part IS menopause-related** | | **Lipids** | LDL-C tends to rise | | **Insulin sensitivity** | May fall | | **Sleep** | Frequently disrupted — vasomotor symptoms, and disrupted sleep has its own metabolic consequences | | **Symptoms** | Vasomotor symptoms, mood, joint pain, urogenital sym → Nutrition Science: What the Evidence Actually Says About What to Eat
the highest-yield mineral test by a wide margin · FBC **alongside, not instead** · serum magnesium rarely useful · zinc/selenium/copper only with clinical suspicion · urinary iodine is a **population** measure · ❌ **"mineral hair analysis" is not validated — avoid.** → Nutrition Science: What the Evidence Actually Says About What to Eat
iron-deficient without anemia, impairing oxygen delivery and mitochondrial function, which directly limits the aerobic side of §6.4 - **Nine months of amenorrhea**, meaning low estrogen, meaning impaired bone maintenance → Nutrition Science: What the Evidence Actually Says About What to Eat
Ferritin was the test she needed
and with heavy periods plus > fatigue, there was a clear indication for it. > > **The self-supplementation:** ⚠️ taking iron without testing is the specific thing §14.2 warns > against. In her case it may well be right, but she doesn't know, nobody has a baseline to measure > improvement against, an → Nutrition Science: What the Evidence Actually Says About What to Eat
⚠️ **Carbohydrate not digested in the small intestine.** ⚠️ **Chapter 11 calls it the book's largest evidence-to-attention gap.** *(Ch 11)* → Appendix I — Glossary
Find a case where it fails
a substance where no dose is acceptable, or where the framing actively misleads. b) Does the principle apply to *patterns* as well as substances? What's the "dose" of a dietary pattern? c) ⚠️ Could this threshold be used to defend anything? **What stops it becoming a universal excuse** ("it's fine i → Nutrition Science: What the Evidence Actually Says About What to Eat
Find out what you actually drink
grams of ethanol and calories, honest week 2. **Know what you're trading** — pleasure and connection vs. cancer risk, sleep, BP, triglycerides, calories with zero satiety return. *No cardiovascular bonus.* 3. **The dose-response is smooth — there's no cliff.** 14 → 7 captures a large share of the be → Nutrition Science: What the Evidence Actually Says About What to Eat
⚠️ **Fermentable carbohydrates implicated in IBS symptoms.** ⚠️ **The low-FODMAP protocol has THREE phases and the reintroduction phase is the one commercial programmes omit.** *(Ch 27, 28)* → Appendix I — Glossary
Folic acid
a trial, then fortification, then a measurable fall in neural tube defects. > **Iodized salt** — a mechanism, then fortification, then the near-disappearance of endemic goitre. > **ORS** — a mechanism, then a sachet, then a collapse in diarrhoeal mortality. > > **All three are cheap. All three requi → Nutrition Science: What the Evidence Actually Says About What to Eat
Folic acid preconception
⚠️ **the neural tube closes at ~4 weeks, often before pregnancy is known.** 400 µg/day; higher in defined risk groups. ✅ **Iodine · iron · vitamin D.** ⚠️ **CHOLINE — under-taught, requirements rise, intakes often low, and many prenatal supplements contain little or none. Check yours.** 🟢 **Oily fis → Nutrition Science: What the Evidence Actually Says About What to Eat
⚠️ **Limited or uncertain access to adequate food.** ⚠️ **A risk factor for disordered eating, and it runs the same restriction cycle without anyone calling it a diet.** *(Ch 32, 34)* → Appendix I — Glossary
⚠️ **on the time, transport, storage and cash-flow costs of eating on a low income.** **The recurring findings: buying in bulk requires capital, storage requires space, "cook from scratch" requires equipment and hours, and the household is usually already optimizing harder than the advice-giver.** → Nutrition Science: What the Evidence Actually Says About What to Eat
*Salmonella*, *Campylobacter*, *Listeria*, *E. coli* O157, norovirus | **Millions of illnesses, tens of thousands of hospitalizations, and hundreds to thousands of deaths annually in the US alone**, by national surveillance estimates | | **Diet composition** — energy, sodium, fiber, UPF | ⚠️ **Large → Nutrition Science: What the Evidence Actually Says About What to Eat
Foods do differ in their acid or alkaline load
the > concept of **potential renal acid load (PRAL)** is genuine, and diets high in protein and grains > produce more acid load than diets high in fruit and vegetables. And **urine pH genuinely does change > with diet**, which provides a visible, testable-looking confirmation. > > **What the evidenc → Nutrition Science: What the Evidence Actually Says About What to Eat
For genuinely high-heat applications
searing, deep frying, wok cooking — refined avocado oil has > the advantage, and the smoke point is the relevant property there. > > **For almost everything a home cook actually does** — sautéing, roasting at 180–200°C, frying an egg > — the difference is largely irrelevant, and extra-virgin olive o → Nutrition Science: What the Evidence Actually Says About What to Eat
For minerals, absorption varies enormously
with your current status, with the chemical form, and with what else is in the meal. Iron absorption can range from a few percent to over a third depending on circumstances. **This is why §14.10 matters more here than the equivalent section did in Chapter 13.** → Nutrition Science: What the Evidence Actually Says About What to Eat
small enough that a single unusual responder in either arm can move the result. And **"healthy adults aged 22–41"** is not you, unless you are a healthy adult aged 22 to 41. Findings in young healthy people frequently don't transfer to older people, sick people, or people with the condition the supp → Nutrition Science: What the Evidence Actually Says About What to Eat
some antipsychotics, some antidepressants, corticosteroids, insulin and sulfonylureas, some antiepileptics, hormonal treatments | | **Sleep · socioeconomic position · early life · endocrine conditions** | Real, patterned | | **Behaviour** | ⚠️ **Real, modifiable, and downstream of most of the above* → Nutrition Science: What the Evidence Actually Says About What to Eat
Sundays free, Wednesdays never | | **Money** | Not the binding constraint | | **Kitchen** | Good. Oven, four rings, decent knife | | **Freezer** | ⚠️ **A drawer freezer, three drawers, one already full of things he can't identify** | | **Skill** | ⚠️ **Good, and this is important — he enjoys cooking → Nutrition Science: What the Evidence Actually Says About What to Eat
Ghrelin
⚠️ **A hormone initiating eating, which rises before expected meals and is trainable by schedule.** *(Ch 21, 33)* → Appendix I — Glossary
the same molecule that arrives from table sugar. This is true and it is the single most misused fact in nutrition, because people conclude from it that starch and sugar are equivalent. They are chemically similar and nutritionally very different, and §7.3 explains why. → Nutrition Science: What the Evidence Actually Says About What to Eat
⚠️ **A population average of postprandial glucose response.** ⚠️ **Chapter 35 showed how much individual variation that average conceals.** *(Ch 7, 35)* → Appendix I — Glossary
Golden rice
engineered to produce beta-carotene, aimed at vitamin A deficiency, which causes preventable childhood blindness and death at population scale — **was delayed for many years by a combination of regulatory hurdles and organized opposition** before gaining approval in the Philippines. **Reasonable peo → Nutrition Science: What the Evidence Actually Says About What to Eat
tinned beans, tinned tomatoes, tinned fish, frozen veg, oats | ⚠️ **Also very cheap, and the practical answer** | | **Fresh Group 1, cooked** | Cheaper per portion, ⚠️ **more expensive in time, skill, storage and spoilage risk** | | **"UPF-free" branded snacks** | ⚠️ **£/$ premium, and often Group 4 → Nutrition Science: What the Evidence Actually Says About What to Eat
⚠️ **there is a formal methodological literature, used in clinical practice for genuinely individual treatment questions.** ⚠️ **Read it to see how much structure a proper n-of-1 requires, and how far the casual version falls short.** → Nutrition Science: What the Evidence Actually Says About What to Eat
the belief inventory, the claim filter card, the digestion log, the three-day diary, your own RMR? If you've done fewer than three, that's the most common pattern and it's worth being honest about now rather than at Chapter 38, when the project assembles. - **Did you attempt the 🧩 problems before re → Nutrition Science: What the Evidence Actually Says About What to Eat
HDL
Chapter 9 §9.10. Drugs that raise HDL failed repeatedly to reduce events; Mendelian randomization doesn't support a simple causal role. **HDL is a marker, not a lever** — which means a mechanism running through HDL was never as strong as it appeared, and this was knowable before the alcohol MR studi → Nutrition Science: What the Evidence Actually Says About What to Eat
drugs that raise HDL have repeatedly failed to reduce cardiovascular events, and Mendelian randomization doesn't support a simple causal role. **A mechanism that runs through HDL was never as strong as it appeared**, and that was knowable before the MR alcohol studies arrived. → Nutrition Science: What the Evidence Actually Says About What to Eat
particularly vitamin C and > some B vitamins. > > **What the evidence actually shows:** Nutrient loss during cooking depends on **time, temperature, > and contact with water.** Microwaving typically uses **shorter times and much less water** than > boiling — which means it often **preserves water-so → Nutrition Science: What the Evidence Actually Says About What to Eat
Hedonic hunger
⚠️ **Eating driven by reward, cue and palatability rather than energy need.** ⚠️ **Half of Chapter 33's threshold.** *(Ch 33)* → Appendix I — Glossary
ppm range, far below limits. Not a meaningful risk in the finished product. 🟡 **Bleaching/deodorizing strips antioxidants and phytochemicals** — a real nutritional cost. Chapter 7's intact-vs-refined continuum, applied to oils. 🟡 ⚠️ **The honest concession: deodorizing generates small amounts of tra → Nutrition Science: What the Evidence Actually Says About What to Eat
High
5–10+ g/kg body weight; glycogen is the rate-limiting fuel (Ch 6, Ch 23) | | Generally active adult | Anywhere in the AMDR. The *type* matters more than the amount. | | Sedentary, managing weight | Lower end is often easier; not because carbohydrate is harmful but because it's where the easy calorie → Nutrition Science: What the Evidence Actually Says About What to Eat
fresh meat, fish, ready meals, some dairy | ⚠️ **Almost everything else** — dried goods, tinned, frozen, biscuits, most produce | | **Freezing** | ⚠️ **You can freeze up to the use-by date, which resets the clock** | Not usually relevant | | **After the date** | ⚠️ **Discard** | ⚠️ **Assess it. Look → Nutrition Science: What the Evidence Actually Says About What to Eat
⚠️ **the postwar productivity settlement, price supports, and how the commodity mix was determined.** **⚠️ Read at least enough to see that the current structure was designed to solve a real and serious problem, and largely did.** → Nutrition Science: What the Evidence Actually Says About What to Eat
⚠️ **Eating driven by the body's energy-regulation system.** *(Ch 33)* → Appendix I — Glossary
Honours Ch 34's binding note
opens with a carried-forward warning and §35.12 is a full self-monitoring-harms section mapping these products onto **Ch 34 §34.7's vector list row by row**, with the key line: **"rules that are unfalsifiable because they are YOURS"** — a rule from your own biology is harder to argue with than a con → Continuity Tracker — *Nutrition Science*
breast, colorectal, oesophageal, liver, oral. **Along with excess adiposity (12+ cancers), processed meat (Group 1), red meat (2A), low fibre, aflatoxin.** ⚠️ **And the magnitude honesty: dietary factors matter and matter considerably less than not smoking; the biggest dietary lever is alcohol.** §2 → Nutrition Science: What the Evidence Actually Says About What to Eat
IARC Group 1 carcinogen
breast, colorectal, oesophageal, liver, oral (Chapter 12) | | ⚠️ **Excess adiposity** | ⚠️ **A risk factor for more than a dozen cancers** — and Chapter 24's material is therefore also a cancer chapter | | **Processed meat** | **IARC Group 1**; red meat **Group 2A** — ⚠️ **and remember Chapter 20 §2 → Nutrition Science: What the Evidence Actually Says About What to Eat
not because of "starvation mode," but because §5.7 predicts lean loss, unmanageable hunger, NEAT collapse, and abandonment around week eleven. - **Convert every percentage claim to calories, then compare it to one beer.** Fifteen seconds, defeats the whole supplement category. - **Use the number as → Nutrition Science: What the Evidence Actually Says About What to Eat
if you have a history of disordered eating, or if logging has ever tipped into something compulsive — there is a **non-tracking path through every checkpoint**, described in Appendix F. Use it without apology. The project works fine that way. → How to Use This Book
If you restrict carbohydrate, raise protein
gluconeogenesis runs on amino acids and there's no protein store. - **Don't buy a ketone meter to track fat loss.** It measures a slider, not the account. - **Endurance training builds mitochondria** — that's a real, earned improvement in fat-oxidation capacity, and no supplement substitutes. → Nutrition Science: What the Evidence Actually Says About What to Eat
the last part of > the small intestine. > > Using only what's in §3.4, predict at least three specific nutritional consequences. Be as specific > as you can about *which* nutrients and *why*. > > > What I'd expect > > 1. **Vitamin B12 deficiency.** B12 absorption is site → Nutrition Science: What the Evidence Actually Says About What to Eat
Immunoassay interference
troponin, thyroid, hormones. §16.7 | | ⚠️ **Zinc above ~40 mg/day** | Copper deficiency: anemia, neutropenia, **potentially irreversible neurological damage** (Ch 14) | | ⚠️ **Preformed vitamin A** in pregnancy | Teratogenic (Ch 13) | | ⚠️ **Vitamin B6** at high doses | Peripheral neuropathy, someti → Nutrition Science: What the Evidence Actually Says About What to Eat
a note called *Medications*, or your phone's medical ID (accessible from a locked screen, which is the entire point) - **On a card in your wallet** — because phones lock, run out of battery, and are useless if you can't unlock them - **And tell one other person it exists.** A partner. A neighbour. A → Nutrition Science: What the Evidence Actually Says About What to Eat
Increase fluid at the same time
fiber without fluid worsens constipation 3. **Spread across meals** 4. **Better-tolerated sources first** — oats, psyllium, cooked vegetables 5. **Expect 2–4 weeks of adjustment.** Some early gas is the process working. 6. **Vary the sources** → Nutrition Science: What the Evidence Actually Says About What to Eat
Increased preference for the reward food
usually the one you were trying to limit | | **Using food to soothe emotion** | Emotional eating patterns later | | ⚠️ **Commenting on a child's weight or body** | ⚠️ **Disordered eating AND weight gain** (§25.7) | | **"Clean plate" rules** | Overriding satiety signals | → Nutrition Science: What the Evidence Actually Says About What to Eat
Inflammatory bowel disease
**Crohn's disease and ulcerative colitis.** ⚠️ **Diet does not cause IBD and diet does not cure it.** **But one dietary intervention is genuinely established: ✅ exclusive enteral nutrition — an exclusively liquid formula diet — is an effective induction therapy for paediatric Crohn's disease**, ⚠️ * → Nutrition Science: What the Evidence Actually Says About What to Eat
deliberately, as the Project Checkpoint's Row 3, and because there's an argument for them even if it's a weak one. **The three sofa drinks were not restocked**, and a large water bottle with his name on it appeared in the fridge. → Nutrition Science: What the Evidence Actually Says About What to Eat
equipment, sterile supplies, trained staff, a facility. ORS is **a sachet of salt and sugar in the right ratio, dissolved in clean water, administered by anyone, anywhere, with no equipment and no training.** Its global dissemination is credited with saving an enormous number of lives. → Nutrition Science: What the Evidence Actually Says About What to Eat
Intrinsic factor (stomach) + ileum = B12
reused in Ch 13/25/29. Brush border explains lactose intolerance (one enzyme) vs celiac (lost carpet). Gut hormone table (ghrelin/CCK/GIP/GLP-1/PYY + leptin from adipose) — **GLP-1 agonists cited as the large-scale demonstration that appetite is hormonal**; Ch 24 owns the drugs. §3.9 **Atwater facto → Continuity Tracker — *Nutrition Science*
Intuitive eating
**33 §33.10** · ⚠️ *a homeostatic strategy; right problem for some readers* → Index
Intuitive eating is a HOMEOSTATIC strategy
**a good corrective for rule-driven eating, weak against cue-driven eating.** ⚠️ **"Listen to your body" is not useful guidance about a bag of chips at 21:40: the body is not what is talking.** **⚠️ It gets one thing unambiguously right — forbidden-food lists increase craving, and permission reduces → Nutrition Science: What the Evidence Actually Says About What to Eat
**14**, 25, App A · ⚠️ *a genuine widespread gap* → Index
Iodine deficiency causes goitre
the visible thyroid enlargement that was endemic across large inland regions, including the "goitre belt" of the American Midwest and Great Lakes, and across much of continental Europe and Asia. In severely affected areas, goitre prevalence was very high. → Nutrition Science: What the Evidence Actually Says About What to Eat
Iron
**14**, 15, 23, 34, App A, App H · ⚠️ *diagnosed deficiency only* → Index
**Heme (~15–35% absorbed) vs non-heme (~2–20%)**, with absorption powerfully modified: **vitamin C and meat enhance; phytate, tea/coffee polyphenols and calcium inhibit.** - **Hepcidin** regulates absorption; there's **no excretion route**. - **Ferritin = stores (falls early). Hemoglobin = consequen → Nutrition Science: What the Evidence Actually Says About What to Eat
Chapter 5's adaptive thermogenesis is a response to *sustained* deficit > and it happens on any diet, fasting included. > > **3. And "boosting metabolism" is Chapter 5 §5.8's aisle**, arriving without a product attached. > > 📉 **Evidence quality:** Good on short-fast norepinephrine and RMR maintenan → Nutrition Science: What the Evidence Actually Says About What to Eat
**a poorly-executed train-low > programme is indistinguishable from chronic under-fuelling** (§23.2), **and that is the failure mode > I see most often.** > > ⚠️ **If you are not being coached by someone who does this deliberately, do not do it accidentally.** → Nutrition Science: What the Evidence Actually Says About What to Eat
RMR falls below what composition predicts; non-resting expenditure falls; muscle becomes more efficient. **🟡 magnitude and persistence genuinely disputed** (commonly estimated in the tens to ~200 kcal/day range). → Nutrition Science: What the Evidence Actually Says About What to Eat
digestion, energy balance, metabolism, macronutrients, micronutrients, the gut microbiome, sports nutrition, clinical nutrition, nutrition across the lifespan, food systems — with no assumed background in chemistry, biology, or statistics. → Nutrition Science
digestion, energy, metabolism, the macronutrients, the micronutrients, the microbiome, the clinical applications — from the ground up, assuming nothing. No chemistry. No biology past "cells exist." No statistics. Where math is needed, it is arithmetic, and I show every step. → Preface
it's a feature of industrial
agriculture generally
benefit up to adequacy, then flat, then eventually harm. | | Deficiency is about not eating enough of a food. | Deficiency is about intake **or** absorption **or** requirement **or** drug interaction **or** losses. | | A blood test and a food diary tell you the same thing. | They answer different qu → Nutrition Science: What the Evidence Actually Says About What to Eat
K
kcal per 100 g IS ENERGY DENSITY
Chapter 22's mechanism, mandatory in the top row, read by > almost nobody. > > **Anchors: fruit and vegetables <100 · cooked grains and legumes 100–200 · bread and lean meat > 250–350 · biscuits, chocolate and crisps 450–550 · oils ~900.** → Nutrition Science: What the Evidence Actually Says About What to Eat
keep the eggs
which he > had been avoiding since 2016 on advice that had been withdrawn. > > Then I told him the thing that mattered most: **his fat intake was not his problem.** His alcohol was > 190 kcal a day, his fiber was 14 g against a target of 38, and he was 490 kcal a day in surplus. The > saturated fat → Nutrition Science: What the Evidence Actually Says About What to Eat
**not from fatty acids.** So not eating carbohydrate is biochemically survivable and **the cost is paid in protein.** - **Ketone bodies** cross the blood–brain barrier where fatty acids can't, letting the brain run largely on fat-derived fuel and sparing protein. **A survival adaptation, not a hack. → Nutrition Science: What the Evidence Actually Says About What to Eat
a 12-carbon fatty acid that behaves much more like a long-chain fat than like the true MCTs (C6–C10) the research concerns. Controlled trials consistently find it raises LDL relative to unsaturated plant oils. → Nutrition Science: What the Evidence Actually Says About What to Eat
⚠️ **on system boundaries, allocation between co-products, and functional units.** **⚠️ Read at least one, because "per kilogram versus per calorie versus per gram of protein" is not a technicality; it is where a great deal of the public argument is actually being conducted.** → Nutrition Science: What the Evidence Actually Says About What to Eat
B12 needs the ileum, and losing that stretch can't be fixed with diet. 3. **Fat takes a different route** — via lymph, bypassing the liver's first pass — which explains a surprising amount. 4. **Your liver is detoxing right now** and has no backlog. This kills the entire cleanse category. 5. **The g → Nutrition Science: What the Evidence Actually Says About What to Eat
Look AHEAD
the intensive lifestyle intervention trial in type 2 diabetes. Find its primary outcome result and its secondary outcomes. Write a page on how a trial can "fail" and still be informative, and on what its early termination means. → Nutrition Science: What the Evidence Actually Says About What to Eat
Losses concentrate UPSTREAM
**harvest, storage, transport, refrigeration.** ⚠️ **A cold chain problem, and largely an infrastructure and capital problem** | |---|---| | ⚠️ **Higher-income countries** | ⚠️ **Losses concentrate DOWNSTREAM** — **retail and, above all, households.** ⚠️ **A behaviour, planning and date-labelling pr → Nutrition Science: What the Evidence Actually Says About What to Eat
Low energy availability and RED-S
Case Study 2 | | **Medications requiring food**, or with narrow timing windows | Ask a pharmacist (Chapter 16) | | **History of gallstones** | Rapid weight loss and prolonged fasting are associated with gallstone formation | | **Anyone whose job involves safety-critical work while adapting** | Early → Nutrition Science: What the Evidence Actually Says About What to Eat
*"the strangest instruction I got"* | | **Race morning, −3 h** | Porridge, banana, honey, salt — **~130 g carbohydrate** | | **−30 min** | 25 g carbohydrate drink | | **During, from 45 min** | ⚠️ **75 g/h — mixed-carbohydrate source, 4 feeds/h, 2 of them non-gel** | | **Fluid** | ⚠️ **~500 mL/h base → Nutrition Science: What the Evidence Actually Says About What to Eat
low-FODMAP diet
its evidence base, its intended duration, and the concern that it is widely used as a permanent diet rather than a temporary diagnostic protocol. What are the risks of long-term FODMAP restriction? *(Chapter 28 covers this; forming your own view first is better.)* → Nutrition Science: What the Evidence Actually Says About What to Eat
on a PPI, and low intake (Chapter 13) | | **Vitamin D** | Low | | **Albumin, CRP, FBC, TFTs, coeliac screen, and a cancer-symptom review** | ⚠️ **Appropriately requested — unintentional weight loss requires investigation** | → Nutrition Science: What the Evidence Actually Says About What to Eat
Lower
typically meaningfully so, varying by crop | | **Land use per unit of food** | ⚠️ **Higher**, following from yield | | **Synthetic nitrogen and its runoff** | **Lower** — a real and significant benefit | | **Biodiversity on the farm** | **Generally higher** | | **Soil organic matter** | **Generally → Nutrition Science: What the Evidence Actually Says About What to Eat
Lower cadmium is worth taking seriously
cadmium is a genuinely toxic heavy metal that > accumulates. > > ⚠️ **And no study has demonstrated a health outcome difference from eating organic versus conventional > produce**, which is the endpoint anyone actually cares about. → Nutrition Science: What the Evidence Actually Says About What to Eat
Lowers LDL
viscous gel traps bile acids → liver makes more from cholesterol → LDL falls. *(Same mechanism as the bile acid sequestrant drug class, for twenty cents.)* 2. **Blunts glucose absorption** — mechanically, without changing the carbohydrate 3. **Increases satiety** — volume, chewing, gastric emptying, → Nutrition Science: What the Evidence Actually Says About What to Eat
celiac, IBD, bariatric, pancreatic | Multiple, clinically supervised, lifelong | | **Exclusively breastfed infants** | **Vitamin D**; **vitamin K at birth** | | **People on interfering medications** | e.g. metformin and B12 | | **Strength and power athletes** | **Creatine** ✅ | | **Athletes generall → Nutrition Science: What the Evidence Actually Says About What to Eat
not thirty minutes. Reviews examining the timing literature have generally concluded that **total daily protein intake is the dominant variable** and that timing effects, where present, are small. The apparent urgency in early studies was substantially confounded by whether participants had eaten be → Nutrition Science: What the Evidence Actually Says About What to Eat
**36 §36.6** · ⚠️ *✅ and not seriously contested* → Index
Match everything else
total energy, protein, fiber, food processing level — so that the > only variable is the one you're testing. Which, note, makes it no longer a test of "keto versus > low-fat" as anyone practises them. > 4. **Run it long enough** for hard outcomes, which for cardiovascular disease means decades. > > → Nutrition Science: What the Evidence Actually Says About What to Eat
matrix and dose rate
which controls for much of what usually confounds dietary comparisons. **Caution:** it's still observational. ⚠️ **Juice drinkers and whole-fruit eaters differ in other ways** (healthy-user bias, Chapter 2 §2.3), and no trial has run for decades. → Nutrition Science: What the Evidence Actually Says About What to Eat
**biological markers fluctuate day to day** | |---|---| | **2** | ⚠️ **Regression to the mean** — **those starting worst improve most, mechanically** | | **3** | ⚠️ **Differential adherence** — **the "responders" often did the intervention more** | | **4** | ⚠️ **And genuine individual response** | → Nutrition Science: What the Evidence Actually Says About What to Eat
**people with genetic variants causing lifelong lower LDL-C have > lower cardiovascular risk, across many independent genes.** **The same instrument that made > Chapter 12's alcohol case** > - **Randomized trials of multiple drug classes** — statins, ezetimibe, PCSK9 inhibitors — **all > reducing ev → Nutrition Science: What the Evidence Actually Says About What to Eat
Metabolic adaptation
⚠️ **Reduced energy expenditure with weight loss. Real, and measured in hundreds of calories rather than thousands.** *(Ch 5)* → Appendix I — Glossary
search for the feeding studies on almonds, walnuts, pistachios, and cashews. These are careful, controlled human feeding studies, and reading one is a good education in how hard it is to measure something as apparently simple as "how many calories are in this." → Nutrition Science: What the Evidence Actually Says About What to Eat
metabolizable energy of whole nuts
much of it conducted through USDA Agricultural Research Service feeding studies. How were these studies designed? What makes measuring this so difficult, and what would you have to control? Then consider whether the finding should change food labelling, and what would be lost if it did. → Nutrition Science: What the Evidence Actually Says About What to Eat
Iron (and the crucial gap between low ferritin and anemia), calcium, magnesium, zinc, selenium, iodine, potassium, and sodium; heme versus non-heme absorption and the enhancers and inhibitors; the real-world deficiency patterns by population; sodium's genuinely contested evidence base; and why "elec → Book Outline
Minerals are elements, not molecules
they can't be destroyed, only leached. Which means: absorption is where the action is and it's tightly regulated · **minerals compete with each other** · the deficiency-to-toxicity window is narrower than for vitamins. → Nutrition Science: What the Evidence Actually Says About What to Eat
⚠️ **Keys, 1944–45. Semi-starvation in screened healthy men produced obsessive food preoccupation, ritual, low mood and loss of fullness signalling.** ⚠️ **The behaviours were produced by the restriction, not revealed by it.** *(Ch 33, 34)* → Appendix I — Glossary
Missing or reduced enzyme
lactase, ALDH2 | Hours | ⚠️ **YES — strongly** | | **Pharmacological** | Caffeine, tyramine, histamine, capsaicin | Variable | Yes | | **Functional / osmotic** | ⚠️ **FODMAPs** (Chapter 27) | Hours | ⚠️ **YES — threshold effects** | | ⚠️ **Nocebo** | ⚠️ **Genuine symptoms produced by expectation** | → Nutrition Science: What the Evidence Actually Says About What to Eat
consistent, graded, confounded | | **NOVA's reliability** | ⚠️ **Low. §22.7's first objection is real and unresolved** | | **UPF harm independent of intake and nutrients** | ⚠️ **Low. Genuinely open** | | **Additives and emulsifiers** | ⚠️ **Low — interesting, early, over-discussed** | | **§22.9's i → Nutrition Science: What the Evidence Actually Says About What to Eat
clean, pure, toxic, poison, chemical | | **Restriction as virtue** | Giving something up is inherently healthy; harder is better | **The difficulty is offered as evidence.** "It's not easy, but…" | | **The suppressed truth** | *They* don't want you to know | **Unfalsifiable** — absence of evidence b → Nutrition Science: What the Evidence Actually Says About What to Eat
Moral vocabulary about food
"clean," "bad foods," "guilt-free" | **Ch 34 §34.11** | | ⚠️ **Any comment on a body, including favourable** | **Ch 34 §34.11** | | ⚠️ **Numbers presented as targets in advice to a person** | **Ch 34 §34.7** | | ⚠️ **Relative risk with no baseline** | **Ch 2, Ch 9** | | ⚠️ **A denominator chosen wit → Grading Rubrics
which points directly at §22.5's second and third mechanisms, and is visible in the menus: **you can eat canned ravioli, soft white bread and a packaged snack in six minutes; the salad with chicken, apple slices and seeds is physically hard to eat in under fifteen.** §22.3. → Nutrition Science: What the Evidence Actually Says About What to Eat
**NMN, NR, resveratrol, spermidine** | ⚠️ **Animal and mechanistic data; human outcome data absent.** **⚠️ Untested is not false — and it is not a reason to buy** | | ⚠️ **Many novel probiotic strains** | **27** | | ⚠️ **Most "nootropic" nutritional compounds** | ⚠️ **Marketed far ahead of testing** → Appendix H — Supplement Evidence Grades
worth > checking, because not all do. ⚠️ **This is particularly important for women who avoid dairy, use > non-iodized specialty salt, or eat plant-based** — which is an increasingly common combination and is > exactly the group least likely to be aware of it. > > ⚠️ **And note the other direction:* → Nutrition Science: What the Evidence Actually Says About What to Eat
a multicentre randomized trial — found that folic acid > supplementation substantially reduced the recurrence of neural tube defects in women who had > previously had an affected pregnancy. A separate randomized trial in Hungary found reduction in > first occurrence. **Mandatory folic acid fortifica → Nutrition Science: What the Evidence Actually Says About What to Eat
muscle protein synthesis plateau
the MPS response to a single dose maximizes around 20–40 g in young adults. It confused **synthesis with absorption.** You absorb essentially all of it; the surplus goes to the other jobs protein does, or is oxidized. → Nutrition Science: What the Evidence Actually Says About What to Eat
Detoxes, cleanses, superfoods, alkaline water, celery juice, "boosting" your metabolism/immune system, negative-calorie foods, eating for your blood type. Not just verdicts — an anatomy of *why these particular ideas are so sticky*, so the reader can recognize the shape of the next one. The densest → Book Outline
⚠️ **Non-coeliac gluten sensitivity. Real, distinct from coeliac disease, and fructans may explain a substantial share of it.** *(Ch 28)* → Appendix I — Glossary
Near zero
nothing but juice | | **Vegetable and fruit intake** | "Not much. Maybe corn?" | Substantial, if liquid | | **Sleep** | ~6 hrs, phone in bed | ~7.5 hrs — "I was too tired to stay up" | | **Caffeine** | 4–5 coffees/day | Cut to 1 (the program said to) | | **Total energy intake** | ~3,160 kcal/day | P → Nutrition Science: What the Evidence Actually Says About What to Eat
NEAT
⚠️ **Non-exercise activity thermogenesis. Varies enormously and responds to intake.** *(Ch 5)* → Appendix I — Glossary
Neither is lying. They have not agreed on the dose
EFA deficiency (scaly dermatitis, impaired wound healing, infection susceptibility, infant growth failure; fat-free parenteral nutrition + inadequate formulas). ⚠️ **Forces the coherent sceptical argument to be about DOSE (req 1–2% energy vs intake 5–8%), not toxicity.** Cleanest demonstration of Ch → Continuity Tracker — *Nutrition Science*
next-day soreness
delayed onset muscle soreness — is > mechanical damage and the inflammatory repair response; lactate is long gone by then. This matters > beyond trivia: it's why "flush out the lactic acid" is a meaningless instruction, and why the > supplement industry sells products to remove a substance your body → Nutrition Science: What the Evidence Actually Says About What to Eat
NHS "Behind the Headlines"
the NHS website's service that takes a health story from the press and compares it to the study it was based on. ⚠️ **This is Chapter 1's five-step pipeline, documented case by case**, and it is the fastest way to internalize where over-extension happens. Free, archived, and covers years of stories. → Nutrition Science: What the Evidence Actually Says About What to Eat
Nico's drinks
sports drinks, chocolate milk | **19%** | Chapter 18 | | **Breakfast cereals and bars** (all four of them) | **17%** | — | | **Packaged snacks** — crisps, biscuits, fruit snacks | **15%** | — | | **Sliced bread** *(the emulsifier)* | ⚠️ **12%** | §22.7's problem | | **Ready meals and frozen pizza** → Nutrition Science: What the Evidence Actually Says About What to Eat
the household bought no diet drinks, no sweetener, no sugar-free snacks. §18.13's comparator logic says a diet soda beats a regular soda; it says nothing in favour of buying one where water was already the default. → Nutrition Science: What the Evidence Actually Says About What to Eat
using protein for energy means dismantling functional tissue. 3. **Glycolysis is fast and doesn't need oxygen.** Lactate is a *fuel*, not a waste product, and it doesn't cause next-day soreness. 4. **Mitochondria are the dam.** Citric acid cycle pumps the reservoir; the electron transport chain drai → Nutrition Science: What the Evidence Actually Says About What to Eat
no satiety return
it doesn't reduce subsequent eating, and there's evidence it increases it. Per Chapter 4, energy that doesn't displace other energy is the most efficient possible route to a surplus. Plus §12.1's fat-oxidation suppression, and the fact that it never appears in anyone's mental account of what they at → Nutrition Science: What the Evidence Actually Says About What to Eat
cohorts are confounded, trials aren't; trials are short, cohorts aren't. Agreement is hard to explain away. 2. **Dose-response.** 3. **It survives new methods** — Mendelian randomization uses genetic variants as natural randomization, sidestepping healthy-user bias. 4. **It's boring and old.** Certa → Nutrition Science: What the Evidence Actually Says About What to Eat
**unanswerable in the moment, and it invites self-interrogation > that helps nobody.** > > ⚠️ **INSTEAD: "WHAT STARTED THIS?"** > > ⚠️ **A CUE — a time, a place, a packet, a feeling, the end of something?** > ⚠️ **An INTERVAL since eating?** > ⚠️ **Or a CLAIM I read?** → Appendix D — Evidence Evaluation Toolkit
⚠️ *"How much copper is in that soil?"* - *"What's your yield gap, and where does the missing land come from?"* - *"Do you use antibiotics routinely in livestock?"* — **the question §20.8 says matters most, and he doesn't even keep livestock, which is how rarely it comes up** - *"What would let you → Nutrition Science: What the Evidence Actually Says About What to Eat
because extra virgin olive oil has good oxidative stability, retains polyphenols, tastes better, and is the fat in the dietary pattern with the best outcome evidence (Chapter 10 §10.5). **That's a positive case, not a defensive one.** → Nutrition Science: What the Evidence Actually Says About What to Eat
generally an absence-of-ingredient claim rather than a tested threshold | | **"Lactose-free"** | Definitions vary | | **"Vegan," "plant-based"** | ⚠️ **Not legally defined in most places** — certification schemes fill the gap | → Nutrition Science: What the Evidence Actually Says About What to Eat
selenium and iodine — which is why those two are genuinely > geographically variable and the others largely aren't. > > And "colloidal" and "ionic" mineral products are marketing terms with no established advantage; some > such products have been found to contain heavy metal contaminants. > > 📉 **Ev → Nutrition Science: What the Evidence Actually Says About What to Eat
it means you'd absorbed the sceptical frame more thoroughly than the evidence warranted, which is exactly the failure Chapter 1 §1.8 warned about. - **Have you written the list?** Every supplement, with doses, in your phone. It's been asked for in Chapters 13, 14 and 16. **It takes four minutes and → Nutrition Science: What the Evidence Actually Says About What to Eat
the clinical technique behind most of §17.13. Search **"motivational interviewing brief introduction"** or read **Miller and Rollnick**. ⚠️ **This is a trained skill with an evidence base**, not folk wisdom, and it is genuinely more effective than argument. If any part of §17.13 was useful to you, t → Nutrition Science: What the Evidence Actually Says About What to Eat
On the conventional side:
**Mandatory rotation and cover cropping.** *"Half my neighbours' soil is a growing medium, not a soil."* - ⚠️ **"Stop treating herbicide as free."** Resistance is real and he's watching it arrive. - **Better residue transparency.** *"I'd publish my spray records. Most of us would. Nobody's ever aske → Nutrition Science: What the Evidence Actually Says About What to Eat
On the last three chapters:
Chapter 2 asked you to make a Claim Filter card. **Did you?** If not — and most readers don't — what stopped you? Notice that the answer is almost never "I decided it wasn't valuable." - Which of the three chapters so far felt easiest? For most readers it's this one, because anatomy gives you someth → Nutrition Science: What the Evidence Actually Says About What to Eat
On the organic side:
⚠️ **"Judge inputs on what they do, not where they came from."** Allow the low-toxicity synthetics; restrict copper faster. - **Allow gene editing for disease resistance.** ⚠️ *"Scab-resistant apples would cut my fungicide passes by more than anything else I could do. I can't use them and stay certi → Nutrition Science: What the Evidence Actually Says About What to Eat
On the salt reduction programmes
search **"UK salt reduction programme evaluation"**. ⚠️ **Read this as the model of a nutrient rule that worked, and work out why** (gradual, category-wide, monitored, palates adapted together). **Case Study 2's one success.** → Nutrition Science: What the Evidence Actually Says About What to Eat
On this chapter specifically:
**Did you notice yourself wanting a verdict?** This chapter's central answer is *"it depends on the comparator,"* which is genuinely the finding and genuinely unsatisfying. Notice the pull toward wanting me to just say whether butter is bad. That pull is what both camps are selling to. - **Did you f → Nutrition Science: What the Evidence Actually Says About What to Eat
**giving gradually increasing doses of the allergen under supervision, to raise the reaction threshold.** ⚠️ **A standardized peanut product has been approved in several jurisdictions for defined age groups.** → Nutrition Science: What the Evidence Actually Says About What to Eat
oral rehydration solution
a > precisely balanced mixture of glucose, sodium, and other electrolytes in water — which allows > rehydration by mouth in situations that previously required intravenous fluids. > > The consequence is difficult to overstate. Diarrhoeal disease was, and in places remains, a leading > cause of child → Nutrition Science: What the Evidence Actually Says About What to Eat
Orthorexia
⚠️ **Preoccupation with the healthfulness rather than quantity of food.** ⚠️ **Not a formal diagnosis; ⚗️ under-tested as a distinct entity; names something real that frequently meets criteria for OSFED or ARFID.** *(Ch 34)* → Appendix I — Glossary
OSFED
⚠️ **Other Specified Feeding or Eating Disorder.** ⚠️ **Not a mild category — outcomes are comparable to the named disorders, and the name misleads badly.** *(Ch 34)* → Appendix I — Glossary
Overlap recipes
plan meals that share ingredients | | **Aspirational purchases** | ⚠️ **Nothing "just in case"** (§31.6) | | **Buying for nights you're out** | §31.3's map | | ⚠️ **Not knowing what you have** | ⚠️ **Shop your fridge first** | | **Best-before confusion** | Chapter 30 §30.11b | | ⚠️ **Portion misjudg → Nutrition Science: What the Evidence Actually Says About What to Eat
Oxidative stability
resistance to forming oxidation products when heated — matters more. And it tracks **saturation**: more double bonds means more sites for oxidation. So highly polyunsaturated oils are the *least* stable, and saturated and monounsaturated oils the most. → Nutrition Science: What the Evidence Actually Says About What to Eat
a harmless skin tingling — and it functions as a **perceptible confirmation that the product is doing something.** Creatine produces no sensation at all, ever, and its effects appear over weeks as slightly better training sessions. → Nutrition Science: What the Evidence Actually Says About What to Eat
Part III is done
and you can now read a supplement shelf better than most clinicians. | | **14–17** | Good. Reread §16.1 (DSHEA) and §16.9 (the framework). | | **10–13** | Reread §16.1, §16.3 and §16.5 — the regulation, what works, and what's dangerous. | | **Under 10** | Reread the chapter. Then do Exercise C1 anyw → Nutrition Science: What the Evidence Actually Says About What to Eat
detoxes, sugar, seed oils, organic, fasting, ultra-processed food. Try running §16.9's questions and Chapter 2's Claim Filter *before* reading each verdict. Being wrong is informative; the prediction is what does the work. → Nutrition Science: What the Evidence Actually Says About What to Eat
Part IV is this one threshold applied five times
Ch 19 (seed oils = dose question in a purity costume), Ch 20 (residues = dose argued as presence), Ch 21 (fasting = dose of time), Ch 22 (UPF). **Cite the five slots in each.** **§18.1 = the four claims argued as one** (1 uncontroversial → 4 minority). **Claim 3 (fructose harms independent of calori → Continuity Tracker — *Nutrition Science*
the grinding half of the diagram above, not the subtraction half. > > Steel-cut oats are groats chopped into a few coarse pieces; rolled oats are steamed and flattened; > instant oats are pre-cooked, rolled much thinner, and often cut finer still. Each step increases the > surface area available to → Nutrition Science: What the Evidence Actually Says About What to Eat
PAYS BOTH CH 32 DEBTS EXPLICITLY
the hook QUOTES §32.11's deferral verbatim and says "the debt is now due," then §36.2 answers §32.2's unexplained clause ("not an accident of retail"). **Hook = Marisol's shelf, biscuits vs dried lentils, an 8-row comparison** ending on: **"a system that spent a century optimizing for calories per h → Continuity Tracker — *Nutrition Science*
Peaks in absolute terms
often higher than at any later point | | ⚠️ **Calcium and vitamin D** | ⚠️ **Peak bone mass is largely accrued by the late teens to early twenties.** **Bone laid down now determines fracture risk fifty years later** — §25.10's problem, decided here | | ⚠️ **Iron** | **Rises in both sexes with growth → Nutrition Science: What the Evidence Actually Says About What to Eat
peripheral neuropathy
tingling, numbness, and gait > problems — which is sometimes **irreversible.** The UL is far below 100 mg, and this dose is not a > harmless excess; it's in the territory where the curve in §13.3's diagram has turned downward. > > **The bitter detail:** high-dose B6 appears routinely in **"nerve sup → Nutrition Science: What the Evidence Actually Says About What to Eat
Peripheral neuropathy, sometimes irreversible
and it's in "nerve support" formulations | | **Niacin** | Flushing; liver toxicity at high dose | | **Biotin** | ⚠️ **Interferes with immunoassays** — troponin, thyroid. *Not toxic; it makes results wrong* | | **Folic acid** | May mask B12 anemia while neurological damage progresses | → Nutrition Science: What the Evidence Actually Says About What to Eat
nightly drinking is more strongly associated > with dependence and with sustained liver exposure, and daily habitual use is harder to reduce than > weekend use because the cue is fixed and frequent. > > **What it tells you about the literature is the important part.** Studies that categorize by > ** → Nutrition Science: What the Evidence Actually Says About What to Eat
a > perfluorinated compound formerly used in manufacturing non-stick coatings — is persistent, has been > detected widely in human blood, and has been associated with health effects. It was **phased out of > US production by 2015** under an EPA stewardship programme. > > **What the evidence actually → Nutrition Science: What the Evidence Actually Says About What to Eat
a figure explicitly set to exceed what 97–98% of people require. > **Comparing everyone to a number designed to cover almost everyone will always make a large fraction > look inadequate**, and it says almost nothing about how many people are actually deficient. > > The correct comparator for populat → Nutrition Science: What the Evidence Actually Says About What to Eat
Post a content note in advance
**not on the day.** ⚠️ **Give students the option to prepare, or to skip.** ⚠️ **Look up your institution's counselling and health services and your national eating disorders organization** (Ch 34 §34.14), **and have them on a slide.** ⚠️ **Read §34.11's language table and check your own lecture voc → Teaching Sensitive Topics
a large Spanish randomized trial — assigned participants at high cardiovascular risk to a Mediterranean dietary pattern supplemented with either extra-virgin olive oil or mixed nuts, versus a control advised to reduce fat. It found **reduced major cardiovascular events** in the Mediterranean arms. → Nutrition Science: What the Evidence Actually Says About What to Eat
Preformed retinol is teratogenic in high doses
pregnancy caution | | **D** | Calcium absorption, bone, immune | Sunlight synthesis; oily fish; fortified foods | Rickets (children), osteomalacia | §13.8 — the special case | | **E** | Antioxidant, membrane protection | Vegetable oils, nuts, seeds | Rare; seen in fat malabsorption | §13.7 — the cau → Nutrition Science: What the Evidence Actually Says About What to Eat
⚠️ net of substitution, smaller than the purchasing effect | > | **Improve health outcomes** | 🟡 **Unclear — not yet established.** Plausible, mechanistically supported, and not yet demonstrated at the outcome level | > | **Reduce health inequality** | 🟡 **Contested — see below** | > > 📉 **Evidence → Nutrition Science: What the Evidence Actually Says About What to Eat
Processed meat
**9**, 26, 37 CS1 · ⚠️ *✅ for the processed category specifically* → Index
**Animal welfare and outdoor access requirements** - ⚠️ **Restrictions on routine antibiotic use in livestock** — which is a genuinely important provision and the one least discussed - **Land history requirements** — typically several years without prohibited substances - **Record-keeping, inspectio → Nutrition Science: What the Evidence Actually Says About What to Eat
Prolonged exercise
generally beyond about 60–90 minutes, especially in heat | Cumulative sodium losses become meaningful; replacing water alone dilutes remaining sodium | | **Very high sweat rates or salty sweaters** | Losses reach clinically relevant amounts faster | | **Multiple sessions per day in heat** | Cumulati → Nutrition Science: What the Evidence Actually Says About What to Eat
Prompted drinking matters here
this is the group where "drink regularly" is genuinely good advice. | | **Infants and young children** | ⚠️ Higher body water percentage, higher surface-area-to-mass ratio, dependent on carers. **Dehydration from gastroenteritis is a genuine emergency** — ORS. | | **Pregnancy and breastfeeding** | I → Nutrition Science: What the Evidence Actually Says About What to Eat
prospective cohort studies
people surveyed about their habitual diet, then followed for years, with deaths recorded. It asked: among these people, did those eating more saturated fat die of cardiovascular disease at higher rates than those eating less? → Nutrition Science: What the Evidence Actually Says About What to Eat
Protection against accidental exposure
the commonest reason, and the strongest | ⚠️ **Reactions during treatment are common, and some are significant** | | ⚠️ **Reduced anxiety around school, parties, travel** | ⚠️ **Daily dosing for years, with a child who may resist it** | | **Adolescence approaching** — the highest-risk period | **Ris → Nutrition Science: What the Evidence Actually Says About What to Eat
it's mid-table, it's convenient, and for someone > struggling to hit a target it's a perfectly reasonable tool. The expensive nonsense is the > *snackified* end: bars, cookies, waters, and crisps, which are ultra-processed foods with a protein > claim on the front (Chapter 22). → Nutrition Science: What the Evidence Actually Says About What to Eat
Protein, creatine, total energy
carbohydrate matters less than endurance athletes assume | | **Weight-category sports** | ⚠️ **Making weight** | ⚠️ **§23.13. This is the highest-risk category in the chapter** | | **Aesthetic sports** | ⚠️ **Body composition judged** | ⚠️ **§23.13 again, and Chapter 34** | | **Ultra-endurance** | ⚠ → Nutrition Science: What the Evidence Actually Says About What to Eat
`pubmed.ncbi.nlm.nih.gov`. Free abstracts for essentially the entire biomedical literature. You will not always get the full text, but you will get species, design, and sample size, which is usually enough to place a claim on the evidence ladder. Chapter 2 and [Appendix D](../../appendices/d-evidenc → Nutrition Science: What the Evidence Actually Says About What to Eat
Pulses
**11**, 32, 36, 37, App C · ⚠️ *the book's best-value single food* → Index
Purity and contamination
shape 2, identified by **moral vocabulary.** ⚠️ **It has no stopping rule because there is no defined endpoint:** foods are morally categorized, the category boundary keeps moving, and **there is always something else that could be eliminated.** *(Chapter 34.)* → Nutrition Science: What the Evidence Actually Says About What to Eat
Q
QUID
⚠️ **Quantitative Ingredient Declaration. A named, pictured or emphasized ingredient must have its percentage declared (EU/UK).** ⚠️ **One of the most useful things on a label.** *(Ch 30)* → Appendix I — Glossary
⚠️ **A reference value set to cover ~97% of healthy people.** ⚠️ **Deliberately above what most people need — so intake below it is not a deficiency.** *(App A, Ch 13)* → Appendix I — Glossary
The Nutrition Facts panel line by line, including the 2016 changes; % Daily Value and how to use it; serving size versus portion; the ingredient list's ordering rule and its loopholes; sugar's many names; front-of-pack claims (nutrient content, health, structure/function) and what each legally requi → Book Outline
⚠️ **Some people compensate almost perfectly**, and Theo eventually did. - **The "7:45 rush"** — hurried, large, often poorly-chosen eating before the window closes. - **It's socially awkward.** ⚠️ **Breakfast with family, morning coffee meetings, lunch at fixed times.** - **Hunger and irritability → Nutrition Science: What the Evidence Actually Says About What to Eat
Reasons it suits some people:
**It requires no measurement, counting, or food-quality judgement.** ⚠️ **One binary decision, made once per day.** - **It removes decision points.** **The mid-morning question disappears** — Theo's 240 kcal of work snacking vanished without a decision. - **Some people genuinely aren't hungry in the → Nutrition Science: What the Evidence Actually Says About What to Eat
⚠️ **Potentially fatal electrolyte and fluid shifts on reintroducing nutrition after substantial undernutrition.** ⚠️ **One of only two places in this book where following general nutrition advice could kill someone.** *(Ch 29, 34)* → Appendix I — Glossary
Referred to his GP
not stopped unilaterally | | "Liver detox" blend | 2 caps | ❌ — proprietary, undisclosed doses (Ch 3) | **Stopped** | | **Vitamin E** | 400 IU | ❌ — no benefit; SELECT safety signal | **Stopped** | | **"Immune blend"** | biotin 3,000 µg · **zinc 50 mg** | ⚠️❌ — **assay interference** and **above the → Nutrition Science: What the Evidence Actually Says About What to Eat
white bread, white rice, pastries. Here you'd expect whole grains to > look genuinely better, and trial evidence on intermediate markers supports that. > 2. **More meat instead** — a low-grain, higher-animal-protein pattern. Different comparison, > murkier answer. > 3. **More vegetables and legumes → Nutrition Science: What the Evidence Actually Says About What to Eat
Reformulation
**36 §36.5**, 36 CS1, 18 · ⚠️ *works for the nutrient, does not address Ch 22* → Index
an evolution of > the earlier **Female Athlete Triad** — describing effects across **bone, endocrine, menstrual, > metabolic, immune, cardiovascular, gastrointestinal and psychological** function, ⚠️ **in athletes of > any sex.** > > **The evidence base includes controlled EA-restriction studies sho → Nutrition Science: What the Evidence Actually Says About What to Eat
the best-supported dietary fat recommendation in existence. 3. **Eat oily fish ~2×/week** if you eat fish. Sardines ≈ $1.20 a tin. 4. **If you don't eat fish**, address omega-3 deliberately — ALA sources, and consider algae-derived EPA/DHA (~$240–$420/year). 5. **Don't fear whole-food fats** — nuts, → Nutrition Science: What the Evidence Actually Says About What to Eat
energy modestly, iron, iodine, folate, choline substantially. **"Eat less" is the wrong instruction and "cut down on fat" removes the oily fish she needs** | | **Alma, 7** | ⚠️ **Actively harmful.** **Weight talk with children is associated with disordered eating AND with weight gain.** **She is gro → Nutrition Science: What the Evidence Actually Says About What to Eat
7 ✅ + 5 🟢 of 78 = **15.4%**, target met. Only fermented foods (Ch 27) still owed. Parts IV–VII are debate-heavy; re-audit at Ch 22 and Ch 29. → Generation Checkpoint
⚠️ **The literature linking cognitive restriction to preoccupation and disinhibition.** *(Ch 33)* → Appendix I — Glossary
Restriction
deliberate, or imposed by circumstance | |---|---| | **2** | ⚠️ **Physiological consequences** — ghrelin up, satiety signalling down, food salience up | | **3** | ⚠️ **Preoccupation** — food occupies attention out of proportion | | **4** | ⚠️ **Disinhibition** — a breach, often triggered by cue, str → Nutrition Science: What the Evidence Actually Says About What to Eat
Restriction of a specific food raises its salience
**the effect is not learned from diet culture, it is what the reward system does when access to a valued stimulus becomes unreliable.** ⚠️ **And pressure converts eating from something you do into something done to you, which is a reliable way to reduce liking for anything.** → Nutrition Science: What the Evidence Actually Says About What to Eat
*"no biscuits, they're bad for you"* | ⚠️ **Less biscuit eating** | ⚠️ **Increased WANTING for it, more consumption when it is available unsupervised, and higher reported liking** | | ⚠️ **Pressures toward a food** — *"three more bites of broccoli"* | **More broccoli eating** | ⚠️ **Reduced liking f → Nutrition Science: What the Evidence Actually Says About What to Eat
Retail and shelf position
**36 §36.5b** · ⚠️ *eye level is frequently a purchased asset* → Index
⚠️ **metabolomic and proteomic signatures of what people have actually eaten.** **⚠️ If this works, it fixes the single largest methodological weakness in nutrition science** (Chapter 3), **and it would improve population research more than it would enable individual prescriptions.** → Nutrition Science: What the Evidence Actually Says About What to Eat
whatever's cheap: carrots, onions, peppers, squash | | **Oven, second shelf** | **A large roast chicken** *(or a tray of baked tofu, or both)* | | **Hob, pan 1** | **A big pot of rice or grains** | | **Hob, pan 2** | ⚠️ **A pot of lentils or a tin's worth of beans, simmered plain** | | **Blender or → Nutrition Science: What the Evidence Actually Says About What to Eat
**Steelman before you strike.** If the strongest version of the claim isn't stated first, cut it. - **🟡 and ⚗️ must be used freely.** A book where every verdict is ❌ is just a different flavor of overconfidence. Roughly a third of all verdicts in the book should be 🟡, ⚗️, ✅, or 🟢 — **including verdi → Continuity Tracker — *Nutrition Science*
Rung 6
a randomized crossover trial, conducted in a metabolic ward, which is about as controlled as human nutrition research gets. Limitations: it was small, it was short, participants were an inpatient sample rather than free-living, and — most importantly — it establishes *that* the effect happened witho → Nutrition Science: What the Evidence Actually Says About What to Eat
⚠️ **What ends the current meal.** **Satiety** — ⚠️ **What delays the next one.** ⚠️ **Conflating them is why "filling food" advice often doesn't last.** *(Ch 33)* → Appendix I — Glossary
Saturated fat raises LDL; LDL matters
both still stand | **The replacement.** Nobody was measuring trans fats. | | **2005** | "Read the label" | The problem was real and product-specific | Placing the burden on shoppers with poor labelling | | **2025** | Olive oil; either spread in real quantities | The substitution frame; the trans fat → Nutrition Science: What the Evidence Actually Says About What to Eat
it doesn't reduce subsequent > eating, and there's decent evidence it *increases* it by reducing inhibition. **Third**, the > thermic-effect discount is real and modest: 190 kcal becomes perhaps 140–170, not zero. > > 📉 **Evidence quality:** Well-established metabolic studies. > > **Verdict: 🟠 Proba → Nutrition Science: What the Evidence Actually Says About What to Eat
⚠️ **Tiring of the food being eaten but not of a different food.** ⚠️ **Explains dessert, and buffets.** *(Ch 33)* → Appendix I — Glossary
serum beta-carotene
an objective laboratory value, immune to the food-frequency-questionnaire problems from Chapter 1. People with higher blood beta-carotene got less lung cancer. And the association persisted after adjustment for smoking. → Nutrition Science: What the Evidence Actually Says About What to Eat
there's no evidence it works and reasonable evidence it backfires. **For clinicians the operative finding is healthcare avoidance: a patient who stops attending has not been helped by candour, whatever was intended.** §24.9. → Nutrition Science: What the Evidence Actually Says About What to Eat
the abstainer reference group is enriched with people who stopped because they were ill 2. **Healthy-user bias** — moderate drinkers are wealthier, better educated, better connected 3. **Exposure misclassification** — underreporting, and averaging that merges very different patterns → Nutrition Science: What the Evidence Actually Says About What to Eat
**33 §33.11**, 37 · ⚠️ *best effort-to-effect ratio in the book* → Index
Slower finishing times
more time and more aid stations - **Smaller body size** — a given fluid excess is a larger proportion of body water - **Female sex** — partly body size, partly other factors - **Longer event duration** - **High fluid availability** — abundant aid stations - **NSAIDs** — impair renal water excretion → Nutrition Science: What the Evidence Actually Says About What to Eat
Small amounts
or a **carbohydrate mouth rinse**, which has a real, replicated effect mediated by oral receptors rather than by fuel | | **1–2.5 h** | ⚠️ **30–60 g/hour** | | **> 2.5–3 h** | ⚠️ **Up to ~90 g/hour — but only with MULTIPLE TRANSPORTABLE CARBOHYDRATES** | → Nutrition Science: What the Evidence Actually Says About What to Eat
small in absolute terms
on the order of a small number of additional cases per thousand people. - The evidence is almost entirely **observational**, subject to confounding, and rests on dietary measurement of known poor precision. - There are essentially no long-term randomized trials of red meat consumption with hard endp → Nutrition Science: What the Evidence Actually Says About What to Eat
sea salt, Himalayan pink salt, kosher salt — are **generally not iodized.** As these have displaced iodized table salt, iodine intake has fallen in some populations. - **Most salt in the food supply comes from processed food**, and manufacturers typically use non-iodized salt. - **Reduced dairy cons → Nutrition Science: What the Evidence Actually Says About What to Eat
Spina bifida
incomplete closure of the spine, ranging from mild to causing paralysis, bowel and bladder dysfunction, and hydrocephalus requiring lifelong management - **Anencephaly** — failure of the skull and brain to develop; not compatible with survival → Nutrition Science: What the Evidence Actually Says About What to Eat
Sports Nutrition
Energy availability first (and **RED-S**, which is where most athlete nutrition problems actually start); carbohydrate periodization; protein timing and dose; hydration and sodium for athletes; the small number of ergogenic aids with real evidence (creatine, caffeine, nitrate, beta-alanine, bicarbon → Book Outline
St John's Wort and CYP3A4 induction
the mechanism, the affected drug classes, and documented cases of contraceptive failure and transplant rejection. Then consider why a pharmacy-shelf product with this interaction profile requires no warning at point of sale. → Nutrition Science: What the Evidence Actually Says About What to Eat
St John's Wort is the most dangerous common one
a potent CYP3A4 inducer affecting contraceptives, warfarin, immunosuppressants, antiretrovirals. Plus bleeding risk (fish oil, ginkgo, garlic, vitamin E), berberine on diabetes drugs, mineral–thyroid timing, potassium. → Nutrition Science: What the Evidence Actually Says About What to Eat
stale
> guidance
correct when issued, superseded since, and never retracted to the person holding it. > > **There is no mechanism in the entire health system for telling you that something you were told in > 2009 is no longer thought to be true.** Guidelines are updated. Patients are not. → Nutrition Science: What the Evidence Actually Says About What to Eat
Stale guidance
Chapter 17 Case Study 1's category. **Advice that was correct when issued, superseded on good evidence (LEAP), and never retracted to the people holding it.** **Nobody writes to tell you.** ⚠️ **It's also the argument for Chapter 17's three-year reminder, demonstrated on a claim where the stakes are → Nutrition Science: What the Evidence Actually Says About What to Eat
Starch physically protected by intact structure
whole or coarsely cracked grains, whole legumes, seeds. §7.3 again. - **Retrograded starch** — starch that has been cooked and then **cooled**. As it cools, some of it recrystallizes into a form your enzymes handle poorly. → Nutrition Science: What the Evidence Actually Says About What to Eat
Start with the intestinal clearance work
search **"fructose small intestine clearance liver spillover"** and look for the primary studies from the late 2010s. ⚠️ **This is the finding that reframed the debate and it is still poorly represented in popular discussion on both sides.** → Nutrition Science: What the Evidence Actually Says About What to Eat
starting before conception
the neural tube closes by week four. | | **Vegans need B12** | ✅ **Well supported, non-negotiable** | Absent from unfortified plants; claimed sources contain inactive analogues. Stores last years, so **"I feel fine" carries no information**, and neurological damage can be **irreversible**. | | **Vit → Nutrition Science: What the Evidence Actually Says About What to Eat
[ ] ⚠️ **Two devices, carried, wherever the person goes** - [ ] **In date** — check the expiry now - [ ] ⚠️ **Everyone who cares for them knows where they are AND how to use one** - [ ] **A written plan exists** — school, nursery, grandparents, sports club - [ ] ⚠️ **The person themselves knows, at → Nutrition Science: What the Evidence Actually Says About What to Eat
Step 2 — The five free checks, on every visit:
[ ] ⚠️ **Is there food they can reach, and can they open it?** - [ ] **Are they sitting up?** - [ ] ⚠️ **Do they have their dentures, glasses and hearing aid?** - [ ] ⚠️ **Have they been nil by mouth for a procedure that hasn't happened?** - [ ] **Are they nauseated, in pain, or constipated?** *(All → Nutrition Science: What the Evidence Actually Says About What to Eat
Step 2 — ⚠️ The urgent screen, first.
[ ] ⚠️ **Have I ever had a rapid reaction involving breathing, throat, or faintness?** → **This is an allergy assessment, today** - [ ] ⚠️ **Do I have unexplained iron-deficiency anaemia?** → **Coeliac serology** - [ ] ⚠️ **Am I about to remove gluten?** → **TEST FIRST** (§28.6) → Nutrition Science: What the Evidence Actually Says About What to Eat
step 3
the aggregation — where "linked to markers of inflammation in mice at high > dose" became "causes inflammation," dropping the species and the dose. Steps 0–2 were each > technically accurate but progressively less complete. > > The important insight is that the *most damaging* step was not the first → Nutrition Science: What the Evidence Actually Says About What to Eat
Step 4 — ⚠️ Check three things specifically:
**Biotin** — in anything? "Hair, skin and nails," "immune," B-complex. If yes, **note it and tell your clinician before blood tests.** - **Zinc** — add up the total across all products. Over ~40 mg/day? - **Proprietary blends** — any? Those are automatically unassessable. → Nutrition Science: What the Evidence Actually Says About What to Eat
Still applies
and RED-S occurs in recreational athletes too, particularly those combining moderate training with deliberate restriction | | **Carbohydrate** | ⚠️ **3–5 g/kg.** **You do not need 8** — and eating like a marathoner while training like a jogger is a common and expensive error | | **Protein** | **1.4– → Nutrition Science: What the Evidence Actually Says About What to Eat
Stopped
biotin 3,000 µg **and** zinc 50 mg, above the UL (Ch 14) | | **The list** | Every supplement and medication, with doses, in his phone and on his GP record | | **The audit** | Chapter 11's Case Study 1 → $2,244/year to $310 | | **What replaced it** | Targeted B12 (Ch 13), and a fiber ramp 14 → 30 g ( → Nutrition Science: What the Evidence Actually Says About What to Eat
STRENGTH
all published in major journals and all findable. Read REDUCE-IT and STRENGTH together, plus the published correspondence about the **mineral oil placebo**. This is a live scientific argument being conducted properly, in public, and watching it is more educational than any summary. → Nutrition Science: What the Evidence Actually Says About What to Eat
Chapter 22 §22.11's constraints, arriving as an outcome | | **Early-life factors** | Birth weight, early feeding, and childhood adversity all show associations (Chapter 25) | | **Endocrine conditions** | Hypothyroidism, Cushing's, PCOS — **less common than assumed, and real** | | **Behaviour** | ⚠️ → Nutrition Science: What the Evidence Actually Says About What to Eat
"supports immune health," "promotes joint comfort" | | **Required disclaimer** | — | *"This statement has not been evaluated by the FDA. This product is not intended to diagnose, treat, cure, or prevent any disease."* | → Nutrition Science: What the Evidence Actually Says About What to Eat
substantial
benefit
but the trial used mineral oil as placebo, and the placebo group's LDL and inflammatory markers rose, which has generated serious ongoing debate about how much of the apparent benefit is real. - **STRENGTH** (high-dose EPA/DHA, corn oil placebo, similar population): **null.** → Nutrition Science: What the Evidence Actually Says About What to Eat
Substitution rule
⚠️ **The health effect of removing a food depends on what replaces it.** ⚠️ **Chapter 9's central move, and it applies throughout.** *(Ch 9)* → Appendix I — Glossary
**18**, 36 §36.7, 37 · ⚠️ *✅, the clearest single target* → Index
Supplementation raises the size of that battery
muscle creatine stores rise by something like > 20–40% in people who start with lower baseline levels. > > **Two things follow, and they define the whole verdict.** > > **First: it works where the battery is rate-limiting.** Repeated short maximal efforts — sets of > heavy lifting, sprint intervals, → Nutrition Science: What the Evidence Actually Says About What to Eat
plus healthy-user reasoning. Increased intestinal permeability is a *measured marker*. The claim treats it as a disease cause. Establishing that a marker changes in a condition is not establishing that changing the marker changes the condition — the beta-carotene lesson, in a new outfit. → Nutrition Science: What the Evidence Actually Says About What to Eat
Survivorship bias
⚠️ **Drawing conclusions from what remained without accounting for what did not.** ⚠️ **Chapter 37 §37.2b concedes this applies to its own historical argument.** *(Ch 24, 37)* → Appendix I — Glossary
Séralini's 2012 rat tumour
> study
was **retracted by *Food and Chemical Toxicology* in 2013** on grounds including > inadequate sample size and the tumour-prone strain used, and later republished in another journal. > ⚠️ **It continues to circulate widely.** > > 📉 **Evidence quality:** Multiple independent national academy reviews; → Nutrition Science: What the Evidence Actually Says About What to Eat
T
Take this seriously
it's a documented tissue-level change in human body composition across decades, and it's routinely omitted by people arguing the mainstream position. **"Unprecedented" is not "harmful," but it is an excellent reason to investigate.** §19.3. → Nutrition Science: What the Evidence Actually Says About What to Eat
she's 27 g short, more than 40% below target. > > Three things make her case harder than a non-vegetarian's: > > 1. **She's in an energy deficit** (§8.11), which pushes protein requirements *up*, not down, because > lean tissue is at risk and because gluconeogenesis is pulling on amino acids (Chapte → Nutrition Science: What the Evidence Actually Says About What to Eat
Teratogenic
birth defects; also liver toxicity, bone effects | **Beta-carotene is not** — the body regulates conversion. The distinction matters enormously in pregnancy. | | **D** | Hypercalcaemia, kidney damage | Requires sustained very high intake; rare but real | | **E** | Bleeding risk; the SELECT prostate → Nutrition Science: What the Evidence Actually Says About What to Eat
tinned beans, frozen vegetables, tinned fish, plain yoghurt, oats. **The four genuine warnings: it's not a moral category · not everything in a packet is poison · nobody needs zero · and the framing carries a documented disordered-eating risk.** §22.12, §22.13. → Nutrition Science: What the Evidence Actually Says About What to Eat
That's the chapter, and it works.
--- chapter: 24 title: "Weight Management: Why Maintenance Is the Hard Part, and What Actually Changed" part: 5 slug: "chapter-24-weight-management" word_count_target: 9500 themes_emphasized: [2, 3, 4, 5, 6] threshold_concept: true threshold_name: "Body weight is a defended physiological system, not → Nutrition Science: What the Evidence Actually Says About What to Eat
the
> suppressed truth
via some version of "the food industry doesn't want you to know about this." > > Note that identifying the shapes doesn't prove the claim false. It tells you *why the claim is > spreading*, which is a different question from whether it's true — and it tells you to demand > better evidence than you'd → Nutrition Science: What the Evidence Actually Says About What to Eat
adherence drifts 2. **Dropout is 20–40% and non-random** — the worst performers leave 3. **Every reasonable diet removes the same foods** — soda, pastries, snacking, takeaway 4. **Everything runs through energy balance** (Ch 4) → Nutrition Science: What the Evidence Actually Says About What to Eat
The calculus INVERTS
sarcopenia and frailty become the dominant risks, and unintended weight loss is a red flag (Chapter 25) | | **A child or adolescent** | ⚠️ **Do not apply this chapter.** **Growth changes everything and the iatrogenic risk is high** (Chapters 25 and 34) | | **An athlete in a weight-sensitive sport** → Nutrition Science: What the Evidence Actually Says About What to Eat
**The great majority of samples have residues below the legal tolerance** — typically well above 95% - **A large fraction have no detectable residues at all** - ⚠️ **Where residues are detected, they are typically a small fraction of the tolerance level** - **The tolerance itself is set with substan → Nutrition Science: What the Evidence Actually Says About What to Eat
search for the work of **George Brooks and Jacques Mercier** on the crossover point, and for the literature on **Fatmax**. This is the real physiology behind the treadmill chart, stated properly. Reading the primary description is instructive precisely because the researchers are careful about what → Nutrition Science: What the Evidence Actually Says About What to Eat
The cue log is safe as designed
**no calories, no quantities, no judgement** — ⚠️ **and say so explicitly, because students will assume it is a food diary.** ⚠️ **Offer the analytical alternative.** ⚠️ **§33.6's restriction cycle will be personally recognizable to some students. Teach it as physiology, which is what the Minnesota → Teaching Sensitive Topics
The default
almost everything | | Refined olive, avocado, peanut | Genuinely high heat | | Canola/rapeseed | General cooking; useful ALA | | Butter, ghee | Flavour | | Sunflower, corn, soybean | Fine generally; less stable at very high heat | | **Flax, walnut** | **Dressings only. Never heat.** | | Coconut | Fl → Nutrition Science: What the Evidence Actually Says About What to Eat
The developmental origins framework
often associated with **David Barker's** work — **proposes that early-life nutritional environment programmes later disease risk.** ⚠️ **The core observations are real; the mechanisms are complex; and the leap from "early nutrition matters" to "your mother's diet determined your metabolic fate" is c → Nutrition Science: What the Evidence Actually Says About What to Eat
and the trials that matter are the ones that swapped sugar > for other carbohydrate at matched calories. **When they do, the weight difference largely > disappears.** When sugar is simply added or removed without compensation, weight changes. > > **Which points to energy** (Chapter 4) **rather than → Nutrition Science: What the Evidence Actually Says About What to Eat
The EAS Consensus Panel statement on LDL causality
search **"LDL cholesterol causal atherosclerotic cardiovascular disease consensus statement."** ⚠️ **This document assembles the genetic, trial and mechanistic evidence in one place, and it is the best available demonstration of what a settled causal question looks like.** **Read it deliberately aga → Nutrition Science: What the Evidence Actually Says About What to Eat
that's the > trap. Nobody is wrong to eat blueberries. **They're wrong to think a blueberry is doing something a > vegetable isn't**, and to pay a premium for the belief. > > 🧾 **Cost check.** Açaí powder ~$45/lb · goji berries ~$18/lb · wheatgrass powder ~$60/lb · spirulina > ~$40/lb — against **ca → Nutrition Science: What the Evidence Actually Says About What to Eat
⚠️ **associations with lower disordered eating, better body image and better psychological wellbeing are reasonably consistent.** **⚠️ Much of it is cross-sectional, and the causal direction is not established.** → Nutrition Science: What the Evidence Actually Says About What to Eat
the fuelling numbers scale to mass and load and probably transfer; the timing, adaptation and supplement specifics transfer less. **And almost all of it is short-term** — ⚠️ **excellent about a time trial next Tuesday, thin about a twenty-year career.** → Nutrition Science: What the Evidence Actually Says About What to Eat
two working parents, two kids, one peanut allergy, one set of stomach aches, and $180 a week for four people. They exist to keep this book honest about the fact that most nutrition advice is written for people with money and time. → How to Use This Book
no single Paleolithic diet; modern foods differ; humans kept evolving | | **Carnivore** | Effective elimination; removes UPF, sugar, alcohol at once; high protein | ⚗️ **No long-term controlled trials exist.** Zero fiber. | → Nutrition Science: What the Evidence Actually Says About What to Eat
The presentation is characteristic:
**Scaly, dry dermatitis** — the skin's barrier function depends on specific LA-derived lipids - **Impaired wound healing** - **Increased susceptibility to infection** - **Hair loss and growth failure in infants** → Nutrition Science: What the Evidence Actually Says About What to Eat
The PROBIT trial
search **"PROBIT breastfeeding promotion cluster randomized Belarus."** ⚠️ **This is the strongest causal evidence available and it is more modest than most advocacy suggests and more positive than most contrarianism suggests.** → Nutrition Science: What the Evidence Actually Says About What to Eat
The problems were knowable and were noted
sick-quitter bias was discussed in the literature from early on. But they were treated as caveats to a robust finding rather than as candidate explanations *for* the finding, and that framing choice determined the next thirty years. → Nutrition Science: What the Evidence Actually Says About What to Eat
increasing dietary LA doesn't reliably raise tissue arachidonic acid, and higher LA intake is generally associated with **lower** risk. *Residual:* the omega-3 half is genuinely supported; absolute amount may matter more than ratio. → Nutrition Science: What the Evidence Actually Says About What to Eat
The reasoning
which is the actual content, and is in the chapters. ⚠️ **The practical material in Part VI**, most of which Chapter 31 §31.16 conceded is craft rather than science and was therefore not given verdicts. ⚠️ **The threshold concepts**, which are not claims but reframings — they are listed in Chapter 3 → Appendix E — Master Claim Index
a hospital-affiliated outpatient clinic in a mid-size American city (**Kestrel Bay**), where Amara sees patients two days a week. Referral-based: cardiology, endocrinology, GI, oncology, sports medicine. The other three days she is at **Kestrel Bay University**, in a nutrition-epidemiology group. → Continuity Tracker — *Nutrition Science*
The salt reduction was real, gradual and effective
**and salt reduction programmes are one of the genuine public health successes of this period, precisely because the reduction was incremental and applied across a whole category so palates adjusted together.** → Nutrition Science: What the Evidence Actually Says About What to Eat
the same shape
roughly one case per 75–100 people, stacked endpoints, smooth dose-response, no threshold. **If you found one persuasive and the other dismissible, that difference is coming from you rather than from the data.** → Nutrition Science: What the Evidence Actually Says About What to Eat
the body regulates that conversion rather than performing it in proportion to > supply. > > **This is Chapter 6's lesson arriving again in a different system:** *a pathway existing is not the > same as a pathway being the rate-limiting step.* **A biochemistry diagram shows you what can happen. > It → Nutrition Science: What the Evidence Actually Says About What to Eat
**which students mostly have already** | |---|---| | **2** | ⚠️ **CALIBRATED CONFIDENCE** — **knowing which parts are ✅ and which are 🟡, and that the difference matters** | | **3** | ⚠️ **A FILTER** — **Ch 37 §37.7's six questions, with Ch 2's ladder underneath** | | **4** | ⚠️ **A RECOVERY PROCEDUR → Instructor Guide — Overview
The strongest is PREDIMED
**a Spanish randomized trial of a Mediterranean dietary pattern supplemented with either extra-virgin olive oil or mixed nuts, against a control advised to reduce dietary fat, in people at high cardiovascular risk.** ⚠️ **It reported reduced major cardiovascular events in the Mediterranean groups.** → Nutrition Science: What the Evidence Actually Says About What to Eat
Mexico (2014), the UK Soft Drinks Industry Levy (2018), and several US cities. I describe their design and the general direction of findings rather than quoting precise effect sizes, because the estimates vary substantially by study, method and follow-up period, and inventing a number would break th → Nutrition Science: What the Evidence Actually Says About What to Eat
they usually do, because they're the most responsive to alcohol and energy balance. The A1c dropped out of the prediabetes range. And his LDL came down by twelve points, some of which is the olive oil and most of which is the seven kilograms. → Nutrition Science: What the Evidence Actually Says About What to Eat
search for **HM Treasury** documentation on its structure, then for published evaluations of reformulation. ⚠️ **Understand the tiering and the two-year notice before reading any evaluation**, or you'll misattribute the mechanism (Case Study 2). → Nutrition Science: What the Evidence Actually Says About What to Eat
The WHO 2023 guideline on non-sugar sweeteners
free at `who.int`. ⚠️ **Read the certainty ratings and the "conditional" designation, not the headline.** The guideline is much more careful than its coverage was, and the gap between the two is a Chapter 1 §1.4 pipeline case study you can verify yourself. → Nutrition Science: What the Evidence Actually Says About What to Eat
organic is generally better per hectare and often worse per kilogram. **Which metric matters depends on whether land is the constraint, and if lower yields mean more land is farmed, it comes from somewhere.** *(Organic is generally better on nitrogen runoff, biodiversity and soil organic matter — th → Nutrition Science: What the Evidence Actually Says About What to Eat
terms like **"dirty dozen pesticide residue toxicological relevance"** and **"consumer risk pesticide residues EWG methodology."** ⚠️ **The substitution-effect argument — that the list may reduce produce purchasing — has been studied, and the work is worth reading rather than taking from me.** → Nutrition Science: What the Evidence Actually Says About What to Eat
Theo unsealed the Ch 1 Belief Inventory
10 beliefs, 8 wrong or overstated; **4 of 4 rated confidence-5 were wrong, the only one he doubted (superfoods, rated 2) was the only one he was right about.** Canon: **confidence tracked repetition, not evidence.** Two new named categories, reusable later: **"stale guidance"** (correct when issued, → Continuity Tracker — *Nutrition Science*
a group of fermentable carbohydrates that trigger symptoms in people with IBS and in a substantial fraction of people who believe they're reacting to gluten. This is Nico's story, and Chapter 28 owns it. What matters here is the principle: **a carbohydrate that causes you symptoms is not necessarily → Nutrition Science: What the Evidence Actually Says About What to Eat
anabolic resistance | | Combining rice and beans at each meal | The amino acid pool does it across the day | | "Only 30 g per meal is absorbed" | That's the synthesis plateau, not absorption | | Sprinting to the shake within 30 minutes | The window is hours; the daily total dominates | | Avoiding pr → Nutrition Science: What the Evidence Actually Says About What to Eat
but judging 1967 by 2026 norms will systematically > mislead you about how unusual the episode was. > > **2. Ancel Keys's work was independent of sugar money**, and the diet-heart hypothesis had substantial > momentum from many sources (Chapter 9 §18.6). **One review did not create it.** > > **3. Jo → Nutrition Science: What the Evidence Actually Says About What to Eat
two metatarsal, one tibial | | Amenorrhea | **Nine months** | | Performance | Declining across two seasons despite increased training | | The specific complaint | *"At about eighteen minutes there's nothing there, and then I have to run the rest of it on nothing"* | | Blood tests | **Three, all repo → Nutrition Science: What the Evidence Actually Says About What to Eat
`threshold_concept: true` + `threshold:` line, 🚪 in title, §37.1, Chapter Summary and `key-takeaways.md`. **THRESHOLD: the answer was always boring, and boring is why it works.** ⚠️ **The chapter opens by saying it will DISAPPOINT rather than surprise, and that the disappointment is the signal.** ** → Continuity Tracker — *Nutrition Science*
THRESHOLD PROPERLY MARKED THIS TIME
`threshold_concept: true` + `threshold:` line in frontmatter, 🚪 in the title, in §33.3, in the summary and in `key-takeaways.md`. **THRESHOLD: hunger is two systems — homeostatic and hedonic — and most diets fight the wrong one.** BOTH halves insisted on; **explicitly NOT "hunger is real, cravings a → Continuity Tracker — *Nutrition Science*
[ ] **Menstrual irregularity or absence** *(⚠️ and note: this is not a normal consequence of training)* - [ ] **A bone stress injury** - [ ] **Recurrent illness or slow recovery from it** - [ ] **Persistent fatigue, or "dead legs" on second sessions** - [ ] **Poor sleep** - [ ] **Low ferritin or hae → Nutrition Science: What the Evidence Actually Says About What to Eat
*"a new recipe is a hobby; a repertoire is a system"* | | **3** | ⚠️ **No fallback, so one failure ends the plan** *(Ch 10's all-or-nothing pattern)* | | **4** | ⚠️ **Ingredient orphans** — seven unrelated recipes share nothing | → Nutrition Science: What the Evidence Actually Says About What to Eat
formula products, ~850 kcal/day, ~12 weeks | Metformin stopped at start; BP medication reviewed | | **2** | **Structured food reintroduction** — ~6 weeks, stepwise | Weight monitored weekly | | **3** | ⚠️ **Long-term maintenance support** — monthly contact, then quarterly | **The phase that determin → Nutrition Science: What the Evidence Actually Says About What to Eat
total risk
> family history, blood pressure, smoking, diabetes, Lp(a) — and about whether medication is warranted. > **Diet moves LDL modestly; statins and related drugs move it a great deal**, and the evidence for > them on hard outcomes is among the strongest in medicine. A book about food should be clear ab → Nutrition Science: What the Evidence Actually Says About What to Eat
search **"cooking oil test strips total polar compounds."** ⚠️ **A few pounds a pack.** If you fry at home more than occasionally, or if you're just curious what your local takeaway is doing, they exist and they're not professional equipment. → Nutrition Science: What the Evidence Actually Says About What to Eat
Trans fat
**19**, 36 §36.7, 36 §36.13b · ⚠️ *the clearest public health win in the book* → Index
Treat calorie figures as estimates with error bars
useful for direction, not precision. - **Whole ≠ ground ≠ juiced.** Same food, different physical form, genuinely different delivery. - **If a protocol changes eight things at once, you will never learn which one worked.** Decompose it. - **Don't buy anything that promises to remove unnamed toxins.* → Nutrition Science: What the Evidence Actually Says About What to Eat
Triangulation
⚠️ **Support from methods with different weaknesses.** ⚠️ **Chapter 37's argument, and it explicitly claims only PARTIAL independence.** *(Ch 37)* → Appendix I — Glossary
anywhere, not necessarily nutrition. For each, state (i) the true version, (ii) the over-extended version, and (iii) what a person who dismissed the over-extended version might wrongly conclude about the true one. → Nutrition Science: What the Evidence Actually Says About What to Eat
Part I–III in the first term, Parts IV–VII in the second, with the progressive project spanning both. → Learning Paths
Tyramine
⚠️ **a genuine and dangerous interaction with MAOI antidepressants**, requiring specific dietary restriction of aged cheeses, cured meats, fermented products and some others. **A real one, and a useful reminder that a small number of food restrictions are genuinely non-negotiable while most are not. → Nutrition Science: What the Evidence Actually Says About What to Eat
you cannot decide to stop fidgeting less. The countermeasure isn't willpower; it's making movement structural and deliberate (a scheduled walk, a standing desk) so it doesn't rely on an unconscious process that's being suppressed. → Nutrition Science: What the Evidence Actually Says About What to Eat
more calories per gram — **and energy density is one of the better-established drivers of intake.** People tend to eat a fairly consistent *weight* of food. **More calories per gram means more calories.** *(The Hall trial matched presented energy density, which makes this less able to explain that p → Nutrition Science: What the Evidence Actually Says About What to Eat
deliberately, rather than ❌. There is no evidence it works long-term and > no evidence it doesn't, because the studies don't exist. **What can be said with confidence is that > people reporting improvement are reporting something real, and attributing it to the wrong variable** > — and that anyone c → Nutrition Science: What the Evidence Actually Says About What to Eat
Verdict: ✅ Well supported
*in people who are actually deficient*, which requires **measuring > ferritin**, not hemoglobin alone. > > ⚠️ **And the counterpart matters as much as the verdict.** **Do not take iron supplements without > testing.** Iron has no excretion route, absorption rises when you're low and falls when you'r → Nutrition Science: What the Evidence Actually Says About What to Eat
Verdict: 🟠 Probably false
the direction is right, the magnitude is off by roughly an order of > magnitude. > > **And here is why you should lift anyway**, because this verdict is routinely misused: resistance > training preserves lean mass during weight loss (which is most of what determines whether you end > up lighter-and- → Nutrition Science: What the Evidence Actually Says About What to Eat
substantially increases non-heme absorption | **Phytate** (whole grains, legumes, nuts) | | Meat, poultry, fish *(the "meat factor" enhances non-heme absorption too)* | **Polyphenols — tea and coffee**, and this effect is large | | Acidic foods | **Calcium** — dairy or supplements taken with the mea → Nutrition Science: What the Evidence Actually Says About What to Eat
search **"FASTER study keto adapted ultra endurance fat oxidation."** ⚠️ **Read the design before the numbers: it is cross-sectional, comparing self-selected groups.** **It establishes that the adaptation occurs. It does not establish that it helps** — and its authors and its critics disagree produc → Nutrition Science: What the Evidence Actually Says About What to Eat
high glucose uptake and glycolysis even in the presence of oxygen. This is so > reliable that **PET scanning uses a radiolabelled glucose analogue (FDG) to locate tumours.** Cancer > cells genuinely do take up more glucose. > > **Where the inference fails — three places:** > > **1. All your cells us → Nutrition Science: What the Evidence Actually Says About What to Eat
Chapter 15 opened with Priya Achterberg's hyponatremia. **Oxygen at high partial pressure damages lungs. Vitamin A is essential and teratogenic** (Chapter 13). **Iron is essential and a leading cause of poisoning deaths in young children** (Chapter 14). → Nutrition Science: What the Evidence Actually Says About What to Eat
the number moves, clothes fit differently, people > comment. **Maintenance produces no signal at all.** **The reward for a year of successful maintenance > is that nothing happened.** > > **Chapter 10 §10.4's adherence finding, in its harshest form: the behaviour that needs to persist > longest is t → Nutrition Science: What the Evidence Actually Says About What to Eat
RCTs, fortification data, mechanism. *The clearest recommendation in this book.* | | **Vegans need B12** | ✅ **Well supported, non-negotiable** — stores last years, so "I feel fine" carries no information, and neurological damage can be irreversible | | **Vitamin D in the genuinely deficient** | ✅ * → Nutrition Science: What the Evidence Actually Says About What to Eat
Well supported harm
raises LDL *and* lowers HDL. Largely removed. | | **Polyunsaturated** | 🟢 **Probably beneficial** as a replacement for saturated fat | | **Monounsaturated** | 🟢 **Probably beneficial**; central to the best-evidenced patterns | | **Saturated** | 🟡 **Depends entirely on the comparator** | → Nutrition Science: What the Evidence Actually Says About What to Eat
**better olive oil, a fish fillet once a fortnight, fruit they'd stopped buying** | |---|---| | **~$8/week** | ⚠️ **A slow cooker, bought outright in the second month** (§32.5) | | ⚠️ **~$20/week** | ⚠️ **Became the buffer that ended the five-small-shops fortnight from the hook** | → Nutrition Science: What the Evidence Actually Says About What to Eat
**Not reduce her to 1,000 kcal.** That would deepen a deficit that is already below her estimated RMR, worsening lean tissue loss, NEAT suppression, and hunger — and it would delay the diagnosis while she blames herself for another failure. - **Not assume she's underreporting.** She might be — she m → Nutrition Science: What the Evidence Actually Says About What to Eat
What is also true:
⚠️ **Formula is a safe, adequate, and regulated food.** **Infants fed formula grow and develop normally.** - ⚠️ **Some people cannot breastfeed, and some should not** — medications, illness, insufficient supply, prior surgery, HIV in some settings, and mental health. - ⚠️ **And the pressure applied → Nutrition Science: What the Evidence Actually Says About What to Eat
⚠️ **Weight loss does produce benefits that behaviour change alone does not** — **diabetes remission is the clearest example, and it is dose-dependent on weight lost** (Chapter 26). - ⚠️ **§24.11's medications and §24.12's surgery deliver outcome benefits that a weight-neutral approach cannot.** - * → Nutrition Science: What the Evidence Actually Says About What to Eat
**Ingredients you would never have in a kitchen** — hydrolysed protein isolates, modified starches, invert sugar, hydrogenated or interesterified oils, protein isolates - ⚠️ **Cosmetic additives** — colours, flavours, flavour enhancers, emulsifiers, non-sugar sweeteners, thickeners, bulking and firm → Nutrition Science: What the Evidence Actually Says About What to Eat
✅ **Feed the colonic epithelium** — butyrate is its preferred fuel - 🟢 **Support gut barrier function** - 🟢 **Influence immune regulation**, including regulatory T cell populations - 🟢 **Stimulate release of PYY and GLP-1** — ⚠️ **the same satiety hormones as Chapters 3 and 24** - 🟡 **Influence hepa → Nutrition Science: What the Evidence Actually Says About What to Eat
⚠️ **Behaviour change improves cardiometabolic markers, fitness and psychological wellbeing even without weight loss.** **This is well demonstrated.** - **Fitness is a strong independent predictor of mortality**, and improving it does not require weight change. - ⚠️ **Weight-focused approaches carry → Nutrition Science: What the Evidence Actually Says About What to Eat
What that implies, practically:
⚠️ **Only use third-party certified products** — **NSF Certified for Sport, Informed Sport** — and **check the specific batch**, because certification is batch-level. - ⚠️ **The highest-risk categories are exactly the ones marketed to athletes:** weight loss, "pre-workout," "testosterone support," a → Nutrition Science: What the Evidence Actually Says About What to Eat
What the caveats are:
**Test conditions matter enormously.** Proper RMR measurement requires an overnight fast, no exercise beforehand, no caffeine or nicotine, a rested state, and a thermoneutral room. A test done at 2 p.m. after you drove across town and had coffee is measuring something, but it isn't your RMR. - **Tes → Nutrition Science: What the Evidence Actually Says About What to Eat
What the evidence supports:
⚠️ **Lighter is not monotonically faster.** **The relationship is a curve with a peak, and past it performance falls** — through lost power, impaired recovery, injury and RED-S. **Most athletes who are "trying to get lighter" are past the peak, not short of it.** - ⚠️ **Rapid weight loss impairs per → Nutrition Science: What the Evidence Actually Says About What to Eat
What the trials show:
⚠️ **Semaglutide at weight-management doses produced mean weight loss on the order of 15% in the STEP trial programme** — **far beyond anything achieved by lifestyle intervention.** - ⚠️ **Tirzepatide, a dual GIP/GLP-1 agonist, produced mean losses above 20% in the SURMOUNT programme.** - ⚠️ **And t → Nutrition Science: What the Evidence Actually Says About What to Eat
What they found:
⚠️ **The intervention worked on the intermediate outcome.** Replacing saturated fat with linoleic acid **lowered serum cholesterol**, as expected. - ⚠️ **It did not reduce mortality.** In these trials, **the cholesterol-lowering did not translate into survival benefit**, and in some analyses the int → Nutrition Science: What the Evidence Actually Says About What to Eat
small, boring, stable for decades, generates no headlines - **What we're FAIRLY CONFIDENT about** — dietary patterns, mostly; larger than skeptics admit - **What we're GUESSING** — enormous, and where nearly everything anyone tries to sell you lives → Nutrition Science: What the Evidence Actually Says About What to Eat
⚠️ **Resting metabolic rate falls below what body composition predicts**, after weight loss. - **The effect appears within weeks of energy restriction** and is partly independent of the weight loss itself. - **Non-resting energy expenditure also falls** — spontaneous movement, fidgeting, general act → Nutrition Science: What the Evidence Actually Says About What to Eat
What's less contested:
⚠️ **Total protein intake tends to fall when the eating window narrows**, simply because there are fewer opportunities. **This is a nutrition problem, not a fasting problem** — and it's fixable. - **Resistance training substantially protects lean mass during weight loss** regardless of meal pattern → Nutrition Science: What the Evidence Actually Says About What to Eat
What's solidly established:
Vitamin D is required for calcium absorption and bone mineralization - Deficiency causes **rickets** in children and **osteomalacia** in adults - Cutaneous synthesis depends on UVB, which depends on latitude, season, time of day, skin pigmentation, clothing, sunscreen and age — **so it is genuinely → Nutrition Science: What the Evidence Actually Says About What to Eat
What's true, and worth knowing:
**Expenditure does fall** — RMR modestly, NEAT substantially, and the larger the deficit the larger the fall. So a severe deficit delivers proportionally less than a moderate one. - **Hunger becomes physiologically overwhelming.** The Minnesota participants — healthy young men with no prior eating p → Nutrition Science: What the Evidence Actually Says About What to Eat
at the desk, at the station, > wherever her existing pauses are — so that drinking attaches to an event that already happens rather > than requiring a new one. Chapter 33's argument: **change the environment, not the resolve.** Then > **drink to thirst when the opportunity exists**, rather than to a → Nutrition Science: What the Evidence Actually Says About What to Eat
Where thirst genuinely under-delivers:
**Older adults** — thirst sensation declines with age, and so does renal concentrating ability. This is a real clinical risk. - **Infants and young children** — can't act on it independently. - **During intense exercise** — thirst can lag behind sweat losses in high-rate situations, though the evide → Nutrition Science: What the Evidence Actually Says About What to Eat
4 g > - **An apple or pear** — 4–6 g > - **A handful of almonds** — 3.5 g > > That's **23–25 g in a box she assembles in four minutes**, needs no fridge for a shift, costs about > $1.80, and replaces a vending machine. > > **Non-shift days — two changes to what the family already eats:** > - **Porri → Nutrition Science: What the Evidence Actually Says About What to Eat
How bad science, bad media, and bad incentives produced dietary chaos: the difficulty of studying diet in free-living humans, the incentives of food companies and wellness brands alike, the reel-to-belief pipeline, and why "experts keep changing their minds" is mostly a story about journalism rather → Book Outline
the concrete consequence, woven in, not announced. 4. **Learning-path routing** right after the hook: `> 🏃 **Fast Track:** …` and `> 🔬 **Deep Dive:** …` 5. **6–9 major sections** `## .1 …` delivering the actual teaching: - Mechanism explained plainly, with an analogy, then the evidence for it. - → Chapter Output Spec
Window shifted EARLY
e.g. 8am–3pm | **The most interesting variant** (§21.7) and the least practised | | **14:10, 12:12** | Milder windows | **12:12 is roughly a normal eating pattern** with a name | | **5:2** | 5 days normal, 2 days at ~500–600 kcal | Popularized by Michael Mosley | | **Alternate-day fasting (ADF)** | → Nutrition Science: What the Evidence Actually Says About What to Eat
⚠️ **including listing fees, slotting allowances and category management.** **⚠️ This is the evidence for §36.5b, it is comparatively dry, and it explains more about what you can buy than almost anything else on this page.** → Nutrition Science: What the Evidence Actually Says About What to Eat
Work on the poverty premium
⚠️ **the documented tendency for low-income households to pay more for the same goods and services: smaller pack sizes, prepayment utility meters, higher-cost credit, insurance loading, and the absence of bulk-purchase capacity.** ⚠️ **UK consumer-organization reports on this are unusually clear and → Nutrition Science: What the Evidence Actually Says About What to Eat
under 200 words — **that gives a family what they need to decide.** b) **What is the single most important sentence in it?** c) ⚠️ **The chapter says a family that declines is not being negligent.** **Do you agree?** **What would change your view?** → Nutrition Science: What the Evidence Actually Says About What to Eat
**adherence beats composition** (Ch 10) | |---|---| | **2** | ⚠️ **It requires no decisions**, **so it survives a bad Wednesday** (Ch 33 §33.4) | | **3** | ⚠️ **No novelty premium to lose** | | ⚠️ **4** | ⚠️ **IT IS ROBUST TO BEING WRONG ABOUT THE DETAILS — the deepest of the four** | → Nutrition Science: What the Evidence Actually Says About What to Eat
⚠️ **which is `teaching-sensitive-topics-guide.md`'s first > assumption, and it applies to a book club as much as to a classroom.** → Syllabus — Self-Paced
USDA FoodData Central, McCance & Widdowson (UK), and national equivalents. **⚠️ Free, searchable, vastly more complete than this page, and updated.** → Appendix C — Food Composition Quick Reference
with error bars | | 6 | Your **fuel-mix reflection**: map a day's energy demands to substrates | | 7 | **Carbohydrate audit**: total, type, refined vs. intact, and where they sit in your day | | 8 | **Protein audit**: g/kg, distribution across meals, sources | | 9 | **Fat audit**: saturated vs. unsa → Continuity Tracker — *Nutrition Science*
Z
zero drinks
then **dips downward** as intake rises to roughly one or two drinks a day, > reaching its lowest point there, before turning and climbing steeply through heavy drinking. > > A shallow bowl with a long right-hand tail. **A J, tipped slightly.** > > The visual message is unmistakable and it is what a → Nutrition Science: What the Evidence Actually Says About What to Eat