Dr. Frank M. Sacks is Professor of Cardiovascular Disease Prevention, Department of Nutrition, Harvard School of Public Health. He is an attending physician at Brigham and Women's Hospital where he has a specialty clinic in hyperlipidemia. He is involved in research and public policy in nutrition, cholesterol disorders, hypertension, and cardiovascular disease.

Dr. Sacks discusses the international epidemic of obesity throughout the United States, Asia, Europe, Samoa and other nations and how obesity is affected by education, politics, and poverty. Dr. Sacks also explores the relationship between soda consumption and weight gain among children; shifts in food practices and serving sizes in the U.S.; and compares popular diets such as the Ornish, Atkins, South Beach, with a traditional Mediterranean diet.