Dr. Caldwell B. Esselstyn, Jr. is the pioneer doctor at the Cleveland Clinic who is known for his work in reversing heart disease through diet:

* Pioneering Research: Dr. Esselstyn's landmark clinical study, which began in 1985, demonstrated that a low-fat, whole-food plant-based diet could not only stop the progression of advanced coronary artery disease but also reverse it in many patients.

* Dietary Approach: The diet he advocates strictly excludes all animal products (meat, poultry, fish, and dairy) and oils.

* Current Role: He currently serves as the Director of the Cardiovascular Disease Prevention and Reversal Program at the Cleveland Clinic Wellness Institute.

* Key Publication: He is the author of the book: “Prevent and Reverse Heart Disease.”

Dr. Esselstyn's work suggests that heart disease is a preventable and reversible condition, challenging conventional approaches that primarily focus on managing the disease.