Case Study 1 — Eleven Products, Two Hours: Marisol Decodes the Shelf

The Ortiz-Lindqvist household is an illustrative composite carried through this book — Marisol Ortiz, Erik Lindqvist, Alma (7), Nico (13). ⚠️ The labelling rules, the claim definitions and the arithmetic are real; the products are constructed composites and no real brand is described.

Setup

Marisol has done this before, twice.

Chapter 20: she audited what she bought organic and reallocated about $940 a year into food her family actually eats. Chapter 22: she audited ultra-processed food and went from 58% of calories to 35%, and the shop got $12 a week cheaper.

⚠️ This time the question is narrower and, she said, more annoying:

"I've changed what I buy twice. I still don't actually know what's in most of it. I just moved to the ones with better-looking packets."

⚠️ That is a fair self-assessment and it is the gap this chapter exists for.

She listed eleven products she buys most weeks. It took her four minutes; she didn't need to check.

The eleven

Sliced wholemeal bread · breakfast cereal (the "multigrain" one) · granola · peanut-free spread for Alma · pasta sauce · flavoured yoghurt · plain yoghurt · tinned baked beans · "veggie" sausages · a fruit-and-oat cereal bar · orange squash

⚠️ Two hours, one evening, at the kitchen table with the packets in front of her.

What the nine-minute protocol found

⚠️ The QUID findings — the ones she called "the annoying ones"

Marisol's reaction to the basil:

"Nought point three per cent. That's — what, a leaf?"

⚠️ And then the sentence that mattered:

"Why have I never seen this before? It's printed right there."

Because nobody had told her it was there, and because it is set in small type inside a list she had never read.

The sugar aliases

⚠️ The granola declares "NO REFINED SUGAR" on the front and contains 21 g of sugars per 100 g.

⚠️ Both statements are true.

Energy density (§30.12)

⚠️ She had assumed the granola and the cereal bar were the "healthy" ones and the baked beans were filler.

💡 Aha moment. ⚠️ "The beans are the cheapest thing on the list and they've got the most fibre and the fewest calories per hundred grams and I've been treating them as what you have when you can't be bothered."

Baked beans: high fibre, meaningful protein, ~81 kcal/100 g, under a pound a tin.

⚠️ Chapter 11's fibre, Chapter 22's Group 3, and Chapter 32's economics, all sitting in a tin she had been slightly embarrassed about.

The front-of-pack sort (§30.7)

Across eleven products she counted the front-of-pack claims and sorted them.

⚠️ Three claims out of forty-one carried decision-relevant information.

What she changed

⚠️ Four swaps. Not eleven — she was explicit about that.

⚠️ And five she kept deliberately:

The flavoured yoghurt (Alma eats it; Chapter 20's adherence argument) · the "veggie" sausages (Nico's, and a weeknight) · the squash (Chapter 18 §18.13 — versus water there's no case, versus what it replaced there is) · the bread (Chapter 22's edge case) · the beans (promoted, actually).

⚠️ And she checked the own-brand version of six other items she hadn't listed. Four had functionally identical ingredients lists.

Six months on

⚠️ The last two rows are the ones she wanted recorded.

"I thought this was going to mean standing in the aisle reading packets forever. It took one evening and now I just buy the list."

⚠️ Which is the meta-step in §30.13, and it is the reason the protocol is worth two hours rather than being a permanent tax on shopping.

Analysis

1. ⚠️ QUID was the finding. Five products declared percentages she had never looked for, and the basil at 0.3% changed a purchase on its own. The rule is legally mandated and functionally invisible.

2. ⚠️ "No refined sugar" and 21 g of sugars coexist, truthfully, on the same package.

3. ⚠️ 31 of 41 front-of-pack claims were provenance. Three of forty-one changed a decision.

4. ⚠️ The energy-density column reversed her ranking. The products she thought were the healthy ones were the most energy-dense; the tin she was faintly embarrassed about was the best thing on the list.

5. ⚠️ Own-brand comparison was the largest single saving, and it required reading two ingredients lists side by side for fifteen seconds.

6. She changed four items out of eleven and kept five deliberately — ⚠️ Chapter 10's adherence finding and Chapter 18's "keep one on purpose," applied to a shelf.

7. ⚠️ And the ongoing cost is zero. Decode once, decide once, shop from the list.

Discussion Questions

1. ⚠️ "Why have I never seen this before? It's printed right there." Whose failure is QUID's invisibility — the regulation's, the manufacturer's, or education's? What would fix it?

2. Basil at 0.3% changed a purchase. ⚠️ Is that a rational response? The sauce's nutritional profile didn't change when she learned the number.

3. ⚠️ Three claims out of forty-one carried decision-relevant information. Should front-of-pack claims be limited in number? Design the rule, then say what manufacturers would do.

4. She kept five products deliberately. ⚠️ Including the squash and the veggie sausages. Is "my family will actually eat it" a sufficient reason? (Chapter 20 said yes.)

5. ⚠️ The own-brand finding saved the most and required the least skill. Why don't more people do it? What is the branded premium actually buying?

6. ⚠️ The ongoing time cost is zero. Does that change how you'd teach this? Most nutrition advice assumes continuous effort.

Your Turn

⚠️ This is the Project Checkpoint, done properly. One evening.

Step 1 — List your regulars. ⚠️ Eight to twelve packaged products you buy most weeks. Write them from memory; you'll be right.

Step 2 — Get them out and run the protocol on each.

Step 3 — ⚠️ The QUID hunt specifically. For every product whose front NAMES or PICTURES an ingredient, find the percentage.

⚠️ Marisol found five. Most households find three to six, and at least one is under 5%.

Step 4 — Count the claims.

Total front-of-pack claims across all products: ____ ⚠️ How many are provenance? _ ⚠️ How many changed a decision once checked? _

Step 5 — Rank by energy density, ⚠️ and check whether your intuitive health ranking matches.

⚠️ It usually doesn't, and the mismatch is the useful part.

Step 6 — Compare four against own-brand. ⚠️ Read the two ingredients lists side by side. Fifteen seconds each.

Step 7 — And then decide once.

Swapping: __ (⚠️ four is plenty) Keeping deliberately: __ (⚠️ and write why)

⚠️ Then put the list in your phone and stop reading labels. That was the point.