Donnie Yance, RH (AHG) is a clinical master herbalist and certified nutritionist who is internationally recognized for his comprehensive knowledge and understanding of the healing properties of plants and nutrition. Donnie conducts his clinical practice at the Mederi Center in Ashland, Oregon, utilizing his unique integrative model known as the Eclectic Triphasic Medical System, which he evolved over more than twenty years of successful patient care.
He is the founder and president of the Mederi Foundation, a not-for-profit organization for professional education and clinical research in integrative medicine. He is also the president and formulator of Natura Health Products, a line of advanced botanical and nutritional products for health care practitioners. Donnie is an avid researcher and lectures nationally on his pioneering work in the field of botanical and nutritional medicine. He is the author of "Herbal Medicine, Healing and Cancer" and "Adaptogens in Medical Herbalism".