Alex Duarte, O.D., Ph.D, is well known for his natural, alternative approaches to solving health problems. Dr. Duarte is a nationally recognized lecturer, author, and radio and television personality. He has written 15 groundbreaking books on nutrition and health topics. Dr. Duarte began his professional career as a research microbiologist. After earning a California secondary teaching credential, he taught biology and chemistry. Following his completion of a doctorate in optometry, he was in clinical practice for nine years. He has traveled the world to find nontoxic alternatives for treating degenerative diseases of the eye and body. Dr. Duarte also holds a Ph.D. in nutrition and is Fellow of the International Academy of Medical Preventives. He has been the nutritionist for several Olympic champions and has lectured for the American Naturopathic Association and the National Nutritional Foods Association. Dr. Duarte is a member of the Board of Editors of the Journal of Applied Nutrition.

Steven Horne is an herbalist, natural health teacher, author, and consultant. His work has taken him all over the United States and Canada and to several foreign countries, including Malaysia, Australia, New Zealand, England, and Mainland China to share this wealth of knowledge. He has spoken at Herbfest, Whole Foods Expo, Clayton College's annual conference, AHG's annual symposium, and numerous conventions and conferences. Steven has served as president of the American Herbalist's Guild for four years and on the Governing Council (Board of Directors) for four years prior to that. Steven is also a member of the International Iridology Practioner's Association (IIPA) and served on their Board of Directors for four years.