Charles Nguyen, M.D., is the medical director of the Lorphen Medical Weight Loss Clinic. His extensive research, clinical experience, teaching, and training in psychiatry offer a unique perspective to help his patients lose weight. His work on weight issues has appeared in various journals, and he frequently speaks at conferences. He lives in Orange County.Tu Nguyen, M.D., is the medical director of N.N. Medical, which provides medical management of weight loss with an emphasis on behaviour modification. He is a diplomate of the American Board of Internal Medicine and has more than 15 years of experience as a bariatric internist. He lives in Orange County.Lorphenmedical.comThinsulinprogram.comMary Ann Marshall is an author, editor and journalist. Marshall has been a regular contributor to Glamour, Ms., Cosmopolitan, and many other magazines. Visit her website at maryannmarshall.net.