Harvard Professor: “I Tried Every Diet. This Is By Far The Worst.” - Daniel Lieberman

Evolutionary lens cuts through diet tribes, myths, and modern food traps

1. A.Lieberman argues nutrition has become tribal and identity-driven because long-term outcomes are uncertain, forcing people to rely on belief and community rather than near-term proof.
2. B.He says the strongest overall evidence favors mostly plant-based, minimally processed patterns (often exemplified by the Mediterranean and DASH diets), while warning that “plant-based” can still be unhealthy when ultra-processed.
3. C.He critiques overconfident, single-idea “hedgehog diets” (carnivore, strict paleo exclusions, raw food, seed-oil panic) and advocates a “fox” approach that integrates epidemiology, mechanistic data, and real-world adherence.
4. D.He explains why many nutrition studies are hard to interpret (healthy-user bias, confounding lifestyle factors, imperfect calorie measurement, food processing changing absorbed energy) and why multiple evidence types must be combined.
5. E.He frames obesity largely as a modern mismatch driven by hyper-palatable ultra-processed foods, then discusses GLP-1 drugs as a powerful but imperfect symptom-treating tool with notable risks like muscle loss and weight regain after stopping.