Reed Mangels, PhD, RD, LD, FADA, is a nutrition advisor for the nonprofit educational Vegetarian Resource Group, as well as nutrition editor and a regular columnist for Vegetarian Journal. She is the coauthor of the American Dietetic Association’ s position paper on vegetarian diets, as well as their new food guide for vegetarians. Dr. Mangels is an instructor in the nutrition department of the University of Massachusetts at Amherst.