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Founder, Formulator, President


Donald R. Yance Jr. MH, CN, RH (AHG), SFO

Donnie Yance received his herbal training through Sequoia College and is a professional member of the American Herbalists Guild. Trained as a clinical nutritionist through the National Institute of Nutritional Education, he holds certification through the National Association of Nutrition Professionals. He is also professed as a Secular Franciscan (SFO), which equips him with the breadth and wisdom to touch on the spiritual aspects of healing.

After decades of extensive research and clinical practice, Donnie developed the Eclectic Triphasic™ Medical System (ETMS), a diagnostic and therapeutic methodology for patient care. Rooted in the American Eclectic herbal tradition, Traditional Chinese Medicine, constitutional energetics and contemporary clinical nutrition, the ETMS is continuously honed by the latest scientific research at molecular, cellular and genomic levels. The ETMS forms the cornerstone for the clinical approach at The Mederi Center for Natural Healing where Donnie and his team of practitioners apply this model in their work with patients.

Donnie is the author of Herbal Medicine, Healing and Cancer and dozens of articles that have appeared in major industry publications and national journals. Each year Donnie lectures throughout the United States at major hospitals and conferences for both patients and health care providers and conducts clinical training programs for health care professionals through the Mederi Foundation, a non-profit organization that serves as the research and education arm of Yance’s mission.


A percentage of all Natura sales supports the programs &
services of The Mederi Foundation

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