Mehmet Oz

 Son of Turkish immigrants, Oz was raised in Wilmington, Delaware, and graduated from Harvard University and the University of Pennsylvania. Dual citizens of both the U.S. and Turkey, Oz was in the Turkish Army in the 1980s for a period of 60 days of mandatory training specifically designed for citizens living in other countries to keep the Turkish citizenship. Then, he began his residency in surgery at Columbia University Irving Medical Center in 1986. He was named an Columbia University professor of surgery in 2001. In the year 2018 it was his turn to retire as a professor emeritus. In 2003, Oprah Winfrey was the first guest on the Discovery Channel program Second Opinion with Dr. Oz, and she was a frequent guest on The Oprah Winfrey Show, making more than sixty appearances. In 2009, The Dr. Oz Show was a daytime television program about medical matters and health, was launched by Winfrey's Harpo Productions and Sony Pictures Television, running for 13 seasons.Oz's proclamation of pseudoscience, including on topics like alternative medicine, faith healing, and various paranormal beliefs have drawn him criticism from a number of medical publications and physicians