Dr. Michael Greger
Physician-communicator · NutritionFacts.org · 'How Not to Die'
His specific claims are mostly directionally sound but systematically presented with more certainty than the aggregate evidence carries — strong on flaxseed lowering blood pressure and cruciferous-vegetable cancer prevention, modest-but-real on plant-based disease PREVENTION and on curcumin's anti-inflammatory effect (a genuine signal, but bioavailability-limited and publication-bias-prone), and overstated on literal 'reversal' of heart disease (which traces to Ornish's tiny multidomain trial). The appropriate skepticism is about cherry-picking and advocacy framing, not money.
Evidence vs. their claims
Across 5 testable claims, where the weight of independent evidence lands — on their side, or against them. Their own research network is excluded as evidence.
Read relative to their stance: when they dispute a claim and the evidence supports that claim, it counts as against them. Each row shows their stance, so you can see which way the evidence cuts.
Conflicts of interest
- Notably CLEAN profile: NutritionFacts.org is a nonprofit with no ads or products, and he has pledged to donate all book/speaking proceeds to charity — no financial-incentive bias
- Borderline on the research bar: a communicator/aggregator with a thin OWN peer-reviewed record (like the Inchauspé case); his authority rests on citing others' studies, not primary research he ran
- Operative bias is ideological/advocacy (committed whole-food plant-based prior), not commercial
Stated factually. Conflicts do not by themselves make a claim wrong; they are context for weighing it.
Claim-by-claim (5)
Grouped by health topic. A person's claims often span several areas — here's where each one lands.
🥗 Diets 4
Educational only, not medical advice. Verdicts grade the evidence, not the person; see the methodology.