John Voorhees is a leading professor and researcher in dermatology, focusing on psoriasis and premature aging. He is a distinguished professor at the University of Michigan Medical School, where he is chair of the dermatology department. Vorhees and his colleagues have unraveled the mechanisms by which UV light and the passage of time destroys the skin’s collagen, providing insight into the treatment and prevention of premature aging. He has been on the editorial board of eight scholarly journals and has written 604 full publications.