Bob Greene is an exercise physiologist and certified personal trainer specializing in fitness, metabolism, and weight loss. He holds a master's degree from the University of Arizona and is a member of the American College of Sports Medicine and the American Council on Exercise. For the past seventeen years he has worked with clients and consulted on the design and management of fitness, spa, and sports medicine programs. Bob has been a guest on the Oprah Winfrey Show. He is also a contributing writer and editor for O the Oprah magazine, and writes articles on health and fitness for Oprah.com. Greene is the bestselling author of The Best Life Diet Cookbook, The Best Life Diet, Revised and Updated, The Best Life Diet, The Best Life Diet Daily Journal, The Total Body Makeover, Get With the Program!, The Get With the Program! Daily Journal, The Get With the Program! Guide to Good Eating, and Make the Connection.

Ann Kearney-Cooke, PhD, is the director of the Cincinnati Psychotherapy Institute. She has been named a distinguished scholar for the Partnership for Women's Health at Columbia University in New York, where she developed the curriculum for the Helping Girls Become Strong Women Project. She has lectured at more than 150 conferences and written on the treatment of eating disorders, body image, and self-esteem. She was honored as a fellow by the American Psychological Association for her outstanding contributions to the psychology of women. She is the psychological expert for the monthly "Ask The Therapist" column of Shape magazine. Her work has been featured on shows such as NBC's Today, CBS's The Morning Show, and Oprah.

Janis Jibrin, M.S., R.D., is the lead nutritionist for thebestlife.com, Bob Greene’s weight loss and fitness website. She is also a contributing editor for Self magazine, the author of The Supermarket Diet and other weight loss books, and freelances for other national magazines. In her private practice, she specializes in weight loss and eating disorders.