IAN K. SMITH, M.D. is the #1 New York Times bestselling author of The Clean 20, SHRED, The Fat Smash Diet, and sixteen other books, and is the host of The Doctors. He has created two national health initiatives-the 50 Million Pound Challenge and the Makeover Mile-and has served two terms on the President's Council on Fitness, Sports, and Nutrition. A graduate of Harvard, Columbia, and the University of Chicago's Pritzker School of Medicine, Smith is an avid fitness enthusiast and sportsman.