Caldwell Blakeman Esselstyn Jr. (born December 12, 1933) is an American physician, author and former Olympic rowing champion. Esselstyn is director of the Heart Disease Reversal Program at the Cleveland Clinic. He is also the author of Prevent and Reverse Heart Disease (2007), in which he argued for a low-fat, whole foods, plant-based diet that avoids all animal products and oils, as well as reducing or avoiding soybeans, nuts, and avocados. The diet has been criticized for its unfounded health claims. ()