Donna Gates, M.Ed., ABAAHP, is the international best-selling author of The Body Ecology Diet: Recovering Your Health and Rebuilding Your Immunity, and The Body Ecology Guide to Growing Younger: Anti-Aging Wisdom for Every Generation. She is also on a mission to change the way the world eats. The Body Ecology Diet was the first of its kind—sugar-free, gluten-free, casein-free, and probiotic rich. In 1994, Donna introduced the natural sweetener stevia to the U.S., began teaching about fermented foods, and coined the phrase “inner ecosystem” to describe the network of microbes that maintains our basic physiological processes—from digestion to immunity. Over the past 25 years, Donna has become one of the most respected authorities in the field of digestive health, diet, and nutrition. In 2013 she completed an Advanced Fellow with the American Academy of Anti-Aging Medicine.