Dr. Joel D. Wallach, BS, DVM, ND is a veterinary scientist, naturopathic physician, and founder of the 90 Essential Nutrients framework. Known as the "Mineral Doctor" and the "Father of Liquid Mineral Supplementation," Dr. Wallach made the world's first non-human cystic fibrosis discovery in selenium-deficient primates in 1977, leading to decades of research on the role of minerals in human and animal health. He is the author of more than 13 books and 70 peer-reviewed scientific papers, including the Smithsonian-listed textbook Diseases of Exotic Animals. Over 45 million copies of his audio recordings have been distributed worldwide. His work bridges veterinary research, naturopathic medicine, and decades of clinical observation.