Joseph Chang, Ph.D. serves as Chief Scientific Officer, Executive VP of Nu Skin Enterprises. Dr. Chang has published numerous scientific papers, reviews, and books on pharmacological research and has over 20 years experience in the healthcare industry. As an established leader in bioscience, he has held various executive research management positions with Wyeth-Ayerst, Rhone-Poulenc Rorer, and other biotechnology companies involved in researching natural products for arthritis and cancer treatment. He is a member of the American Society of Pharmacology and Experimental Therapeutics, American Thoracic Society, and New York Academy of Sciences. Dr. Chang holds a Ph.D. in pharmacology from the University of London and was a postdoctoral fellow at the Johns Hopkins University School of Public Health and Hygiene.