Melina Jampolis is one of only 198 board-certified physician/nutritionists in the entire country. Based in San Francisco, Calif., Dr. Jampolis is a board-certified internist who specializes in nutrition for weight loss and optimal health, including nutrition during pregnancy, for those with heart disease and diabetes, and for athletes seeking to improve sports performance.

Diet and nutrition are Dr. Jampolis' passion. She'll talk to people anywhere just to spread her message; she’s even been known to offer on-the-spot advice to people in grocery stores regarding the nutritional value of protein bars. Dr. Jampolis is a published author, and has appeared frequently on local television as an expert guest .

A graduate of Tufts University's undergraduate school as well as the School of Medicine, Dr. Jampolis completed her residency in internal medicine at Santa Clara Valley Medical Center, a teaching hospital affiliated with the Stanford University School of Medicine. She is a member of the North American Association for the Study of Obesity, the American College of Sports Medicine and the American College of Physicians.

Allow Dr. Jampolis to be your "diet doctor," as she explores the myths and realities behind some of today's most popular diets on FitTV's Diet Doctor, premiering June 20 at 9 p.m. ET/PT