A real dataset, real conclusions, and a real, unresolved scientific dispute worth knowing about.
The China Study refers to a large, real epidemiological survey (a joint Cornell-Oxford-Chinese Academy of Preventive Medicine project) examining diet and disease patterns across rural China, and to the 2005 book of the same name by T. Colin Campbell, which used the data to argue for a whole-food, plant-based diet and against animal protein.
This is a real, ongoing dispute, not a settled matter. Critics — including nutrition writer Denise Minger and biochemist Chris Masterjohn — have argued the book's strong causal conclusions rely on selectively presented correlations from a dataset that, on fuller examination, contains more mixed and complicated relationships than the book emphasises. Campbell and supporters have defended the analysis and disputed these criticisms.
Both the book's influence and its critiques are real and worth knowing — we're not taking a side on who's right, just noting clearly that this is genuinely contested territory, not an uncontroversial scientific consensus, whichever way you lean on the underlying question.
This is similar in spirit to our note on Michael Greger, whose work draws on some of the same tradition — read the strong claims on any side of this debate as one perspective to weigh, not a settled fact.