Dr. Oz, whose full name is Mehmet Oz, is a well-known American cardiothoracic surgeon, author, and television personality. He gained fame as a health expert on the Oprah Winfrey Show before launching his own daytime talk show, The Dr. Oz Show, which focuses on health, wellness, and medical advice. In addition to his television career, Dr. Oz has written several books on health and nutrition. He has also served as a professor at Columbia University and has been involved in various health-related initiatives. His work has sparked both praise and criticism, particularly regarding the promotion of alternative medicine.