Nicholas Perricone /ˈpɛrɨkoʊn/, MD, is a board certified dermatologist, nutritionist who has written several books, primarily on the subjects of weight loss and maintaining the appearance of youth. Perricone is an Adjunct Professor of Medicine at Michigan State University’s College of Human Medicine, from which he received his MD. He has over 40 U.S patents and appeared in two special programs on PBS.