Jason Theodosakis, M.D., M.S., M.P.H., is the Assistant Clinical Professor and the director of the Preventative Medicine Residency Training Program at the University of Arizona College of Medicine in Tucson. Sheila Buff is the author or co-author of many books on medicine, health, and nutrition, including The Complete Idiot's Guide to Vitamins and Minerals, The Good Fat, Bad Fat Counter, and Dr. Atkins' Age-Defying Diet. Brenda Adderly, M.H.A., is a health writer and reporter. She holds a master's degree in health services administration from the George Washington University, in Washington, D.C. She has authored or co-authored more than a dozen books, including The Acne Cure by Rodale Press. Ms. Adderly lives in Los Angeles, California. Barry Fox, Ph.D., has written or co-written many well-known health books, including the bestselling Beverly Hills Medical Diet and DLPA to End Chronic Pain and Depression. He lives in Los Angeles.