Gerard E. Mullin, MD, is an associate professor in the department of medicine, as well as director of Integrative Gastroenterology Nutrition Services at The Johns Hopkins Hospital. Nationally and internationally renowned for his work in integrative gastroenterology and nutrition, Dr. Mullin has accumulated more than 20 years of clinical experience in the field of integrative digestive health and earned his master's degree in nutrition while in practice. He is an honorary member of the Academy of Nutrition and Dietetics and a recipient of the Grace A. Goldsmith award for lifetime achievement in nutrition. Dr. Mullin has authored hundreds of publications and several books.