Dr. Joel B. Mason received his bachelor's degree in general biology from the University of Illinois-Urbana in 1977, and his medical diploma from the University of Chicago Pritzker School of Medicine in 1981. He completed postdoctoral training at the University of Iowa and the University of Chicago Hospitals and Clinics and is triple-boarded (internal medicine, gastroenterology, clinical nutrition). Currently, Joel is an Associate Professor of Medicine and Nutrition; and Director, Vitamins and Carcinogenesis Laboratory, U.S.D.A. Human Nutrition Research Center, Tufts University. He is also Staff Gastroenterologist at the New England Medical Center.

In the last three years, Dr. Mason has received grant/research support from Mead-Johnson Nutritional and also served as a consultant for Mead-Johnson Nutritional.