Dr. Ludwig, described as an “obesity warrior” by Time Magazine, fights for fundamental policy changes to improve the food environment. He is an endocrinologist and researcher at Boston Children’s Hospital, is professor of Pediatrics at Harvard Medical School and professor of Nutrition at Harvard School of Public Health. Dr. Ludwig is the founding director of the Optimal Wellness for Life (OWL) program, one of the country’s oldest and largest clinics for the care of overweight children. For 25 years, Dr. Ludwig has studied the effects of diet on metabolism, body weight and risk for chronic disease – with a special focus on low-glycemic index, low-carbohydrate, and ketogenic diets. He has made major contributions to development of the carbohydrate-insulin model, a physiological perspective on the obesity pandemic.