How the food broke us.

If you've ever wondered why eating less and moving more stopped working, the answer is not in your willpower. It's in a chain of decisions made by industrial chemists, federal committees, and shareholders — most of which had nothing to do with nutrition science. What follows is the short version.

The timeline

1. 10,000 BCE

   Agriculture begins

   Humans transition from foraging to farming. Average stature drops by roughly four inches over the next several thousand years. Dental caries appear in skeletal records for the first time at scale. The Paleolithic body meets the Neolithic plate.

2. 1820s

   Industrial milling

   Roller mills strip the bran and germ from wheat at scale. White flour becomes affordable. Refined-carbohydrate consumption triples within a generation in industrializing economies.

3. 1909

   Hydrogenation patented

   Wilhelm Normann patents the process of hardening liquid vegetable oil. Crisco launches in 1911, marketed as a clean, modern alternative to lard. Industrial seed-oil consumption begins its century-long climb.

4. 1950s

   Diet-heart hypothesis

   Ancel Keys proposes that dietary saturated fat causes heart disease. The Seven Countries Study cherry-picks data; the relationship is fragile but politically convenient. Public-health institutions adopt it as fact.

5. 1977

   U.S. Dietary Goals

   Senator McGovern's committee, despite minimal scientific consensus, recommends Americans cut fat and replace it with complex carbohydrates. Food manufacturers reformulate aggressively. Sugar and refined-grain calories fill the gap.

6. 1980s–90s

   Low-fat revolution

   Snackwell cookies, low-fat yogurt sweetened with HFCS, fat-free salad dressings. Total daily calories rise. Average BMI rises. Type-2 diabetes incidence rises. Obesity rates double in two decades.

7. 2000s

   Ultra-processed normalization

   Industrial reformulation produces foods designed by sensory engineers to override satiety: hyper-palatable, calorically dense, nutrient-stripped. Supermarket aisles are 70%+ ultra-processed by SKU count.

8. 2010s

   Mechanism revealed

   Hall et al. (NIH, 2019) run the definitive controlled-feeding study: matched diets, one ultra-processed and one whole-food. Subjects on the ultra-processed arm overconsume by ~500 kcal/day without conscious effort. The food, not the eater, is doing the work.

9. 2020s

   GLP-1 era

   Semaglutide and tirzepatide produce 15–22% weight loss in trials. They work by partially restoring the satiety signaling that ultra-processed food disrupted. They are an expensive pharmacological workaround for an environmental problem.

The takeaway, plainly

The human metabolism didn't fail. It met a novel environment — one where calories are abundant, satiety signals are scrambled, sleep is light-polluted, movement is optional, and stress is ambient. Every population that adopts this environment, from Inuit to Pima to recently-urbanized rural Chinese, develops the same pattern of metabolic disease at the same speed.

That's not coincidence. That's causation hiding in plain sight. And it means the fix is reversing the inputs — not flogging the system that received them.