Douglas “Duffy” MacKay, ND, is vice president, scientific & regulatory affairs, for the Council for Responsible Nutrition (CRN). Dr. MacKay was a co-owner and practitioner in a family-owned complementary and alternative medicine private practice for seven years. In addition to his hands-on experience as a practitioner in the field of integrative medicine, he spent eight years working as a medical consultant for two companies in the dietary supplement industry. He has also published articles in peer-reviewed journals, and previously served as a senior editor of the peer-reviewed clinical journal Alternative Medicine Review. Dr. MacKay earned his ND from the National College of Naturopathic Medicine in Portland, Oregon, and is licensed in the state of New Hampshire.