Michael F. Holick, ph.d., M.D., is the director of the General Clinical Research Unit and professor of medicine, physiology, and biophysics at Boston University Medical Center. He has been quoted in The New York Times, Forbes, Time, Newsweek, Men�s Health, and Scientific American. He lives in Massachusetts with his family.
Dr. Andrew Weil, Dr. Andrew Weil graduated from Harvard University. He has taught at the University of Arizona in Tucson, specializing in alternative medicine, medical botany and mind/body interactions. He is the founder of the Program in Integrative Medicine at the University of Arizona Health Services. Dr. Weil is the author of several books which includes the titles "The Natural Mind" (1972), "From Chocolate to Morphine" (with Winifred Rosen, 1983), "Natural Health, Natural Medicine" (1990), "Spontaneous Healing" (1995), and "Eating Well for Optimum Health: The Essential Guide to Food, Diet, and Nutrition" (2000).