Dr. Richard Johnson has been a practicing physician and clinical research scientist for more than twenty-five years. He has published hundreds of papers and lectured in over forty-five countries. He is the author of three books, including The Sugar Fix, The Fat Switch, and Nature Wants Us to Be Fat.
Timothy Gower is a freelance writer whose work has appeared in many publications, including Prevention, Reader's Digest, Esquire, Fortune, Health, Men's Health, Better Homes and Gardens, The New York Times, and Los Angeles Times. He is also the author of five books. He resides in Massachusetts.