Dean Ornish.

Dean Michael Ornish, is president and founder of the nonprofit Preventive Medicine Research Institute in Sausalito, California, as well as Clinical Professor of Medicine at the University of California, San Francisco.Ornish is widely known for his lifestyle-driven approach to the control of coronary artery disease (CAD). Dr. Ornish and colleagues showed that a lifestyle regimen featuring Yoga, meditation, a low-fat vegan diet, smoking cessation, and regular exercise could not only stop the progression of CAD, but could actually reverse it. He has acknowledged his debt to Swami Satchidananda for helping him develop this holistic perspective on preventive health.This discovery was notable because it had seemed physiologically implausible, and it suggested cheaper and safer therapies against cardiovascular disease than invasive procedures such as coronary artery bypass surgery.
In 2010 after cardiac surgery, former U.S. president Bill Clinton mostly adopted the plant-based diet recommended by Caldwell Esselstyn, Dean Ornish and T. Colin Campbell. In contrast to Esselstyn, Ornish recommends the consumption of fish oil supplements and does not follow a strict vegetarian diet, allowing for the consumption of occasional animal products.