Lower cholesterol

TL;DR. Lower cholesterol the way the two trials that worked did it. Lyon Diet Heart cut second heart attacks by about 70 percent on a Mediterranean pattern. PREDIMED cut major heart events by about 30 percent on extra-virgin olive oil or nuts. Neither trial was low fat. The scanner blocks partially hydrogenated oil (the one fat Willett calls "unambiguous poison"), warns on dense saturated fat from ultra-processed foods, and rewards Mediterranean markers and soluble fiber. This is general guidance. Familial hypercholesterolemia, statin decisions, and ApoE4 carriers need a clinician.

What this goal does

This goal flags foods that push your cholesterol the wrong way and rewards the foods the trials used to push it the right way. It does not chase a low-fat diet. Fifty years of low-fat advice did not move heart disease. The Mediterranean pattern did.

With this goal on, the scanner will:

• Block any product with partially hydrogenated oil in the ingredient list.
• Warn on products dense in saturated fat from ultra-processed sources.
• Reward Mediterranean markers and soluble fiber.

Pairs well with the lower added sugar goal. The two patterns travel together in most packaged food.

Evidence in 3 paragraphs

The trial backbone is small and clear. Lyon Diet Heart (de Lorgeril, Lancet 1994, Circulation 1999) put 605 French heart-attack survivors on either standard low-fat advice or a Mediterranean pattern of olive oil, a canola-based spread, vegetables, fruit, fish, and nuts. After about four years, the Mediterranean group had about 70 percent fewer second heart attacks and 56 percent lower total death. The trial stopped early. Total cholesterol differed little between groups; the win did not run through LDL. PREDIMED (Estruch et al., NEJM 2013) ran the bigger test: 7,447 high-risk Spaniards, three arms (Mediterranean with EVOO, Mediterranean with mixed nuts, low-fat control). Both Mediterranean arms cut major heart events by about 30 percent. They ate more total fat, not less.

The old lipid hypothesis is wrong in its simple form. Willett walks through this in Eat, Drink, and Be Healthy Chapters 5 and 14. Saturated fat from real food, in normal kitchen amounts, is roughly neutral for heart disease in the long-term cohorts. PURE 2017 across 18 countries found no harm signal. The thing the campaign told Americans to eat instead of butter, partially hydrogenated oil, was the disaster. The FDA banned it in 2018. Estimated heart attacks blocked: 72,000 to 220,000 a year. Willett calls trans fat "unambiguous poison."

The dietary cholesterol scare was also wrong. Your liver makes most of the cholesterol in your blood and dials production down when you eat more. Long-term cohorts find no heart-disease link from daily eggs in healthy people. Diabetics are a real exception. The diet lever that does move LDL is soluble fiber, especially beta-glucan from oats and barley. It binds bile acids in the gut, so your liver has to pull cholesterol out of your blood to make more. One bowl of oatmeal a day lowers LDL by 5 to 10 percent in trials.

What helps

• Extra-virgin olive oil as your main cooking and dressing fat. Two to four tablespoons a day, the PREDIMED dose.
• Fatty fish twice a week: salmon, sardines, mackerel, herring, anchovies. Whole fish, not capsules. Fish-oil capsules have failed multiple large trials.
• A handful of nuts most days. PREDIMED used about 30 g of mixed walnuts, almonds, and hazelnuts.
• Oats, rolled or steel-cut. Not sugary instant packets.
• Legumes: beans, lentils, chickpeas. Soluble fiber plus protein.
• Vegetables, especially leafy greens. Whole grains in their actual whole form.
• Eggs. The egg-whites-only era was a myth.
• Plain Greek yogurt and aged cheese. Fermented dairy looks neutral to slightly heart-protective in meta-analyses.

What hurts

• Anything with "partially hydrogenated" oil in the ingredient list. FDA phased it out by 2018, but old products still show up. Hard block.
• Deep-fried fast food. Oil reheated for days builds up oxidized fats and small amounts of trans fat.
• Stick margarine from the 1990s era. Modern soft spreads without partial hydrogenation are fine.
• Processed meat: bacon, sausage, hot dogs, deli ham. Consistent signal across cohorts. Different problem from a steak.
• Most center-aisle baked goods: pastries, croissants, muffins. Cheap shelf-stable fats plus refined flour plus sugar.
• Coconut oil as an everyday fat if your LDL is already high. Useful in the kitchen, not a superfood.
• Ultra-processed "low-fat" foods. The SnackWell era pulled fat out and put sugar in. Heart disease did not move.

How the scanner uses this

The scanner reads the ingredient list and the Nutrition Facts panel.

Hard rules. A product fails if either is true:

• Partially hydrogenated oil appears anywhere in the ingredient list.
• More than 5 g of saturated fat per serving in a food eaten often.

Soft rules. A product gets a warning if any is true:

• More than 300 mg of cholesterol per serving in a high-frequency food. (Eggs in normal portions do not trigger this. A four-egg breakfast sandwich on a butter croissant does.)
• Two or more dense saturated-fat sources in the ingredient list (palm oil, palm kernel oil, hydrogenated coconut oil, beef tallow, lard) inside an ultra-processed product.

Bonuses. A small boost for each Mediterranean marker: extra-virgin olive oil as a top-three ingredient, fatty fish, whole nuts, legumes in a real portion, whole grains in their whole form, and 3 or more grams of fiber per serving with extra credit if the source is soluble (oats, barley, psyllium, beans, apples).

The trans-fat rule is blunt because Willett calls it "unambiguous poison." The saturated-fat rule catches ultra-processed foods, not home cooking.

Worked examples

Extra-virgin olive oil. The cooking fat the trials used. Bonus.

Rolled oats. About 4 g of beta-glucan per cup. Soluble-fiber bonus.

Wild salmon, 4 oz. Fatty-fish bonus. About 1.5 g of EPA plus DHA.

Walnuts, 1 oz. Nut bonus. The one nut with meaningful plant omega-3.

Whole eggs, 2 large. About 370 mg cholesterol, 3 g saturated fat. Brushes the cholesterol soft rule, but eggs are defended in the cohort data. Plain eggs in normal portions do not get a warning.

Butter, 1 tablespoon. 7 g saturated fat. Neutral in normal home-cooking amounts. A 635,000-person butter meta-analysis did not find the harm signal 50 years of advice predicted.

Beyond Burger. Low saturated fat by design, but ultra-processed: pea protein isolate, coconut oil, canola oil, methylcellulose. No hard-rule failure; no bonus.

Bacon, 3 slices. Saturated fat plus the processed-meat signal. Streak-breaker.

Crisco (older formulations). Partially hydrogenated soybean oil. Hard block.

Honest limits

General guidance, not medical advice. Three groups need a clinician: familial hypercholesterolemia (LDL 200+ from childhood, usually needs a statin); anyone deciding about a statin in primary prevention; and ApoE4 carriers, who handle dietary fat differently. The clinical-nutrition deep dive (D5) covers these cases.

Related reading

• Fats — the messiest story: the long-form story of saturated fat, the lipid hypothesis, the trans-fat reckoning, and the Mediterranean trial evidence.
• The ultra-processed food problem: why dense saturated fat and added sugar travel together in packaged food.
• Reading labels: how to spot partial hydrogenation in the ingredient list.

Sources

1. Willett, W. Eat, Drink, and Be Healthy. Free Press, 2017. Chapter 5 (fat) and Chapter 14 (heart disease). The "what replaces" framework; trans fat as unambiguous poison; defense of the egg.
2. de Lorgeril, M., et al. (1994). "Mediterranean alpha-linolenic acid-rich diet in secondary prevention of coronary heart disease." Lancet, 343(8911), 1454–1459.
3. de Lorgeril, M., et al. (1999). "Mediterranean Diet, Traditional Risk Factors, and the Rate of Cardiovascular Complications After Myocardial Infarction." Circulation, 99(6), 779–785.
4. Estruch, R., et al. (2013/2018). "Primary Prevention of Cardiovascular Disease with a Mediterranean Diet Supplemented with Extra-Virgin Olive Oil or Nuts." NEJM, 368, 1279–1290 (re-analyzed 2018, 378:e34).
5. Dehghan, M., et al. (2017). "Associations of fats and carbohydrate intake with cardiovascular disease and mortality in 18 countries from five continents (PURE)." Lancet, 390(10107), 2050–2062.
6. U.S. Food and Drug Administration (2015/2018). Final determination that partially hydrogenated oils are no longer Generally Recognized as Safe.
7. Hu, F. B., Manson, J. E., & Willett, W. C. (2001). "Types of Dietary Fat and Risk of Coronary Heart Disease: A Critical Review." JACN, 20(1), 5–19.