Gerard Mullin is Associate Professor of Medicine, Director of Integrative GI Nutrition Services, and Director of Capsule Endoscopy for the Gastroenterology Division at the Johns Hopkins Hospital, which has been ranked by US News and World Report as the best hospital in the US for the last 20 years in a row. Dr. Mullin is an internist, gastroenterologist, and nutritionist, and the only physician in the US who is board certified by the American Board of Internal Medicine for Gastroenterology, the American Society of Enteral and Parenteral Nutrition, the American College of Nutrition, and the American Board of Nutrition Physician Specialists. Dr. Mullin also teaches the GI modules at the Arizona Center for Integrative Medicine's Fellowship in Integrative Medicine, a program created by Andrew Weil, MD. An international authority in integrative medicine, nutrition, and gastroenterology, Mullin is well-published in the field of gastrointestinal health and integrative nutrition, and serves on the editorial board for ten medical journals. He also co-edited the Gastrointestinal and Liver Disease Nutrition Desk Reference (2011). In addition, he has appeared on radio and television programs and contributed to stories in The New York Times, Associated Press, ABC News, Good Morning America, Newsday, Martha Stewart Living, Prevention, Mens' Health, and Good Housekeeping. Dr. Mullin graduated from the University of Medicine and Dentistry of New Jersey — New Jersey Medical School, completed his training in internal medicine at the Mount Sinai Hospital, and conducted his fellowship in gastroenterology, hepatology and nutrition at the Johns Hopkins Hospital.