Earl L. Mindell, R.Ph., Ph.D., is the author of the international bestseller The Vitamin Bible, as well as The Herb Bible, The Diet Bible, The Allergy Bible, and many other health books. He is a popular lecturer and a well-known authority on nutrients and natural health. Virginia Hopkins, M.A., has written or coauthored several books on alternative health and nutrition, including What Your Doctor May Not Tell You About Menopause (with John Lee, M.D.).