Part VI — Practical Nutrition

Chapters 30–36

Here is the uncomfortable fact that thirty-five years in this field has taught me, and that almost nothing in Chapters 1 through 29 can fix.

Knowing what to eat has approximately no relationship to eating it.

I can prove this with the least flattering data set available: dietitians. We know more about nutrition than anyone. We are not meaningfully healthier than comparably educated people in other professions. I have stood in my own kitchen at 6:40 on a Tuesday, holding a doctorate in nutritional biochemistry, and eaten cereal over the sink for dinner because my day ended at 6:35 and there was nothing in the house.

If information were the bottleneck, the problem would have been solved by 1985.

The bottleneck is everything else: time, money, transport, cooking skill, a kitchen or the lack of one, the other people you feed and what they'll tolerate, the food environment between your office and your front door, what your family ate when you were nine, how you feel about your body, and whether you slept.

Part VI is about all of that. It is the least sciencey part of this book and, for most readers, the part that will actually change what happens at dinner.

The seven

Chapter 30 — Reading Food Labels. The Nutrition Facts panel line by line, including what changed in the 2016 update and why. Percent Daily Value and how to use it in three seconds. Serving size versus portion, which is a legal distinction and a psychological trap. The ingredient list's ordering rule and the loopholes in it — including sugar's many names and why splitting them across five entries moves them down the list. Front-of-package claims: nutrient content, health claims, and structure/function claims, which have wildly different legal requirements and look identical to a shopper. Immediately usable, this afternoon.

Chapter 31 — Meal Planning and Practical Eating. How to feed yourself well without a PhD, a chef, or an unlimited budget. The plate framework. Component cooking instead of recipes. A small repertoire of flexible templates that work with 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.

Chapter 32 — The Economics of Eating Well. ★ Is healthy food actually more expensive? The honest answer is it depends on how you measure, and the three ways of measuring — cost per calorie, cost per gram of nutrient, cost per meal — give three different answers, which is why both sides of this argument can cite data. Then: time as a cost, food deserts and food swamps, SNAP and WIC, the price of convenience, and a fully worked $180-a-week household budget for four people. If you take away one thing: advice that assumes a car, a full kitchen, and free time isn't advice. It's theater.

Chapter 33 — The Psychology of Eating. ★ 🚪 🪞 Why knowing hasn't been enough. Homeostatic hunger — the body's energy-deficit signal — versus hedonic hunger — the reward system's response to palatability, novelty, and cue. Most diets are built to fight the first and lose to the second. Cravings and what actually reduces them. Habit, cue, and environment. Restraint theory and the what-the-hell effect. Portion cues and mindless eating. Food as culture, comfort, and identity. And the threshold concept: willpower is the wrong frame, and environment design is the right one.

Chapter 34 — Eating Disorders and Disordered Eating. When the pursuit of health becomes the illness. Anorexia, bulimia, binge eating disorder, ARFID, and orthorexia-adjacent behavior. The signs, and who is affected — a far broader group than the stereotype, which is why it gets missed in men, in older adults, in larger bodies, and in athletes. Weight stigma as a driver rather than a corrective. How to talk to someone. Where to get help. And an honest reckoning with the fact that a book like this one can itself become fuel, which is something I've watched happen in my own clinic and have tried hard to design against throughout.

Chapter 35 — Personalized Nutrition. ★ Where the hype has migrated now that "superfood" is played out. Nutrigenomics and the small number of gene–diet interactions with real evidence, against the direct-to-consumer panels selling far more than that. Continuous glucose monitors in people without diabetes. Microbiome-based diet prediction and the PREDICT line of work — genuinely interesting science, aggressively oversold. Metabolomics. Food sensitivity panels. And an honest verdict on whether personalization is ready to sell you anything yet, which is a different question from whether it will be.

Chapter 36 — Food Systems. 🪞 Where your food comes from and what it costs beyond the price. The environmental footprint of different foods, with the ranking that actually survives scrutiny and the several popular claims that don't. Food waste. Labor and food justice. Agricultural subsidies and food policy. And the honest map of where health, environment, budget, and culture agree — which is more often than you'd think — and where they genuinely conflict, which the ethical-eating literature tends to paper over.

The rule this part is built on

Any recommendation that requires you to become a different person is not a recommendation.

You are not going to start meal-prepping on Sundays if you have never once enjoyed cooking. You are not going to shop at three stores. You are not going to weigh your food for the rest of your life, and if you would, you may want to read Chapter 34 first.

So every practical suggestion in these seven chapters is tested against a single question: would this survive a bad week? Advice that only works when everything is going well is advice that fails precisely when you need it — which is why the most useful thing in Chapter 31 is not a meal plan but a floor: the three-ingredient thing you can do when everything has gone wrong, which is better than the cereal over the sink and takes the same four minutes.

What you'll be able to do at the end of Part VI

  • Decode any food label in under a minute, and any front-of-package claim in under five seconds
  • Build meals from a framework rather than a recipe, in whatever cuisine you actually eat
  • Know what your food genuinely costs, per person per day, and where the cheap wins are
  • Recognize hedonic hunger when it happens and respond to it with environment rather than shame
  • Recognize disordered eating in yourself or someone else, and know what to say
  • Evaluate a personalized-nutrition product before you spend $200 on it
  • Hold your health goals and your environmental, ethical, and cultural values in the same hand, including where they pull against each other

And seven Framework components — the label drill, the two-week meal framework, the cost analysis, the environment audit, the relationship-with-food check-in, the personalization decision, and your food-values statement. After this part, you have everything you need for Chapter 38.

Start with the thing in your hand at the grocery store.

Chapters in This Part