Campbell’s earlier rat studies (1970s–80s) with aflatoxin (a liver carcinogen) showed:
Animal products promote inflammation; plants reduce it. Chronic inflammation is the root of nearly every degenerative disease. the china study
Mainstream guidelines tolerate small amounts of animal products based on evidence of benefit (e.g., B12, omega-3s, calcium bioavailability). Campbell argues that any benefit is outweighed by harm and that plant sources suffice. the china study