How Not to Age

Greger's model here is the encyclopedia, not the manifesto: hundreds of interventions are catalogued, each with the underlying study or studies cited, and he flags upfront that a lot of anti-aging science rests on thin evidence. That candor sits uneasily against the book's actual tone, though, since a physician-author writing skeptically about longevity claims is competing against bestseller-writing enthusiasts, and Greger's prose keeps tilting toward optimism even while the footnotes admit the data is a single underpowered trial. The strongest stretch is the opening, where he separates the boring, well-proven levers of longevity (genetics, a plant-heavy diet, exercise, access to care) from the exotic supplements that dominate the rest of the book. Readers wanting a clean verdict on any one intervention should expect to do some of the weighing themselves.