Younan Nowzaradan also known as Dr. Now, is an Iranian-born American doctor of Assyrian heritage, TV personality, and author. He specializes in vascular surgery and bariatric surgery. He is known for helping morbidly obese people lose weight on My 600-lb Life 2012–present.

Nowzaradan was born and raised in Tehran, Iran, and is of Assyrian heritage. In 1970, he graduated from the University of Tehran with a Doctor of Medicine degree. He then moved to the United States. He participated in the Medical Orientation Program at Saint Louis University in 1971 and completed a Rotating Surgical Internship at St. John Hospital operated by St. John Providence Health System in Detroit.Nowzaradan is a fellow of the American College of Surgeons.

Nowzaradan is currently affiliated with Houston Obesity Surgery in Houston, and practices at several local hospitals. He is the author of several scholarly publications on obesity and laparoscopy.