Dr. Chang is an executive who enjoys a comprehensive knowledge of both the pharmaceutical and personal care industries. Dr. Chang formerly served as vice president of clinical affairs and pharmacology at Pharmanex. Before joining Pharmanex, he served as president and chief scientific officer at Binary Therapeutics from 1994 to 1997 and at OAS from 1991 to 1994. He has also held various executive research management positions at Wyeth-Ayerst, Rhone Poulenc Rorer, and other biotechnology companies. A prolific author, Dr. Chang has published numerous articles, reviews and books on pharmacological research, during his 18 years in the healthcare industry. To the personal care side, he brings his dedication to scientific excellence and his passion for obtaining a healthy appearance from both the inside out and the outside in. He obtained his Ph.D. in pharmacology from the University of London and conducted post-doctoral research at The Johns Hopkins University School of Public Health and Hygiene.