William Davis

William R. Davis (born 1957) is an American cardiologist, low-carbohydrate diet advocate and author of health books known for his stance against "modern wheat", which he labels a "perfect, chronic poison".

Medical experts have criticized Davis for making false assertions about wheat, unsupported by evidence-based medicine. His low-carbohydrate Wheat Belly diet has been cited by dietitians as an example of a fad diet and because of its restrictive nature is likely to be low in B-vitamins, calcium and vitamin D. He is the father of tennis player Lauren Davis.