Dr. Leonid Poretsy with Rosalia Doyle

Leonid Porestky, M.D., is a Harvard-trained endocrinologist. He currently serves as the director of the Friedman Diabetes Institute and the chief of the division of endocrinology and metabolism at Beth Israel Medical Center in New York City. Additionally, he is a professor of medicine at the Albert Einstein College of Medicine of Yeshiva University.

Rosalia Doyle is a registered dietitian and holds a master's degree in nutrition with a concentration in exercise physiology. She is a senior staff nutritionist and exercise physiologist at the Gerald J. Friedman Diabetes Institute at Beth Israel Medical Center in New York City.