Eat less obvious junk

TL;DR. Most of your food risk comes from a short list of products: soda, chips, candy, sweetened cereal, packaged sweets, fast food. Stop eating the loudest ones most days and the rest of your diet matters less than you think. This is the cheapest, fastest goal in the app, and it's where Pollan, Lustig, and Means all start.

What this goal does

"Obvious junk" means the products you'd already call junk if a stranger asked you on the street. Soda. Candy. Chips. Toaster pastries. Lunchables. Cheez Whiz. Crunchy frosted cereal. Drive-thru meals built around fried starch. These sit at the loud end of NOVA Group 4: industrial formulations built from substances you don't cook with, designed to be eaten fast and often.

You don't need a label to spot them. You already know which ones they are. Cut the top of that list from your daily intake and stop worrying about borderline products. Kevin Hall's 2019 NIH metabolic-ward trial found that ultra-processed diets push subjects to eat about 500 extra calories a day, even with matched nutrition labels. The loudest, most engineered offenders do most of the work. Start there.

The evidence in 3 paragraphs

Michael Pollan compressed decades of nutrition research into seven words: Eat food. Not too much. Mostly plants. In Food Rules, he gives the operating definition. Don't eat anything your great-grandmother wouldn't recognize as food (Rule 2). Avoid products with more than five ingredients (Rule 7). Avoid products that make health claims on the front of the box (Rule 17). Pollan wrote the rules blunt on purpose, so you can use them in a grocery aisle in 20 seconds. This goal is the Pollan rules with no editing.

Robert Lustig and Casey Means explain the mechanism. In Metabolical, Lustig argues the central driver of metabolic disease is the combination of high fructose load and low fiber, both signatures of NOVA 4 products. Sugar in the top three ingredients (Ch 28) is his quick visual test. Means, in Good Energy, frames the same pattern as mitochondrial overload: cells get more fuel per second than they can burn, the body stores the excess, and chronic disease follows. Hall measured the same biology in the ward. You can metabolize a moderate dose of sugar and fat. NOVA 4 products deliver more, faster, than you can keep up with.

Chris van Tulleken's Ultra-Processed People closes the loop with the dose-response work. Hall's trial gives the cleanest randomized inpatient evidence. Around 250 epidemiology papers find graded harm: more UPF, more disease, even after adjusting for calories, income, and exercise. The dose response is not flat. The heaviest 20% of UPF eaters carry most of the signal. So the practical handle is the loudest products, most days. You don't need to drop to zero.

What helps (your goodenough markers)

• Single-ingredient foods. An apple. A potato. An egg. A chicken thigh. Plain frozen broccoli. These hit the bonus path in the engine.
• NOVA Group 1 and 2 products. Olive oil, rice, dried beans, plain yogurt, butter, oats. Things a grandparent would name as ingredients.
• Short ingredient lists you can read. 5 or fewer items, all words you recognize, none ending in "-ate" or "-ose."
• Real fiber. Whole fruit, vegetables, legumes, intact grains. Fiber slows sugar delivery and feeds the gut microbes that the loudest UPF starves.
• Plain versions of the same role. Sparkling water instead of soda. Yogurt and fruit instead of a smoothie pouch. Roasted nuts instead of cheese puffs.

What hurts (your streak-breakers)

• Hard rule: NOVA Group 4 product carrying 5 or more industrial additives (emulsifiers, gums, modified starches, isolates, color or flavor cocktails). Auto streak-breaker.
• Hard rule: Sugar, syrup, or any other added sweetener in the top 3 ingredients (Lustig, Metabolical Ch 28). Auto streak-breaker.
• Soft rule: 2 to 4 industrial additives without other signals. Counts against the day, not a hard stop.
• Soft rule: Carbohydrate-to-fiber ratio worse than 10 to 1. A common cereal and snack failure mode. Counts against the day.
• Soft rule: Front-of-pack health claims on a NOVA 4 product. The "low fat," "high protein," or "with real fruit" badge does not rescue an industrial formulation.

How the scanner uses this

When you pick Eat less obvious junk as your goal, the verdict engine runs the rules above in order. NOVA 4 with 5+ industrial additives, or sugar in the top 3 ingredients, returns a streak-breaker verdict regardless of calories. 2 to 4 additives, or a carb-to-fiber ratio worse than 10:1, returns fine sometimes. Single-ingredient items and NOVA 1 to 2 products earn a bonus and pass clean. The engine shows you the specific rule it fired in plain words, so you can see why.

Worked examples

• Coca-Cola, 12 oz can: streak-breaker. Sugar is ingredient #2 and the product is NOVA 4.
• Lay's Classic potato chips: fine sometimes. NOVA 4, but the ingredient list is short and there's no added sugar.
• Pop-Tarts, frosted strawberry: streak-breaker. Sugar in the top 3 ingredients, 6+ industrial additives.
• Chobani plain whole-milk yogurt: good enough. NOVA 3, no added sugar, recognizable ingredient list.
• Whole apple: good enough, with bonus. Single-ingredient, NOVA 1.
• Cheerios, original: fine sometimes. NOVA 4 formulation, but added sugar is low and the carb-to-fiber ratio is borderline.
• Pringles Original: streak-breaker. NOVA 4 with 5+ industrial additives, including emulsifiers and flavorings.

Related reading

• Why willpower isn't the problem
• Real food vs. edible foodlike substance
• Grocery shopping in 15 minutes
• The ultra-processed food problem
• Sugar: the clearest case
• The additive playbook

Sources

1. Pollan, M. (2009). Food Rules: An Eater's Manual. Penguin. Rules 2, 7, 17, 19, 36.
2. Lustig, R. (2021). Metabolical: The Lure and the Lies of Processed Food, Nutrition, and Modern Medicine. Harper Wave. Chapters 27–28.
3. Means, C. (2024). Good Energy: The Surprising Connection Between Metabolism and Limitless Health. Avery. Chapters 4 and 7.
4. Hall, K.D. et al. (2019). "Ultra-Processed Diets Cause Excess Calorie Intake and Weight Gain: An Inpatient Randomized Controlled Trial of Ad Libitum Food Intake." Cell Metabolism 30(1): 67–77. DOI: 10.1016/j.cmet.2019.05.008.
5. van Tulleken, C. (2023). Ultra-Processed People. W.W. Norton. Chapters 1, 12, 18.