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.