Joseph Michael Mercola is an alternative medicine proponent, osteopathic physician, and web entrepreneur, who markets a variety of controversial dietary supplements and medical devices through his website, Mercola.com. Until 2013, Mercola operated the “Dr. Mercola Natural Health Center” (formerly the “Optimal Wellness Center”) in Schaumburg, Illinois. He wrote the best-selling books The No-Grain Diet (with Alison Rose Levy) and The Great Bird Flu Hoax. Mercola criticizes many aspects of standard medical practice, such as vaccination and what he views as overuse of prescription drugs and overuse of surgery to treat diseases. On his website mercola.com, Mercola and colleagues advocate a number of unproven alternative health notions including homeopathy, while promoting anti-vaccine positions. Mercola is a member of the political advocacy group Association of American Physicians and Surgeons as well as several alternative medicine organizations.