Dr. Crinnion received his naturopathic doctorate from Bastyr University in 1982. He maintained a private practice while simultaneously holding associate professorships at Bastyr University, SCNM, NCNM and University of Bridgeport where he taught geriatrics and environmental medicine. He was a professor and department chair for environmental medicine at SCNM from 2003 to 2013. He has served as an editor of the environmental medicine section of Alternative Medicine Review and has been a reviewer for several scientific and medical journals including The New England Journal of Medicine. Dr. Crinnion is a staunch advocate of environmental medicine and is the author of the book "Clean, Green & Lean: Get rid of the toxins that make you fat." He appeared on The View with Barbara Walters three times to discuss these issues. He is currently the chief science officer for Enzymedica, a digestive enzyme supplement company in Venice, Florida.