David S. Ludwig, MD, PhD, is a practicing endocrinologist and researcher at Boston Children’s Hospital, Professor of Pediatrics at Harvard Medical School and Professor of Nutrition at Harvard School of Public Health. He is Founding Director of the Optimal Weight for Life (OWL) program at Boston Children’s Hospital, one of the oldest and largest family based weight management programs. He also directs the New Balance Foundation Obesity Prevention Center. Described as an “obesity warrior” by Time Magazine, he has been featured in the New York Times, Boston Globe and USA Today and on NPR, ABC, NBC, CBS, CNN and other networks.