Ann Louise Gittleman holds a master’s in nutrition education from Columbia University, and is certified as a nutrition specialist by the American College of Nutrition. She also has a doctorate in holistic nutrition and has served as the chief nutritionist of the Pediatric Clinic at Bellevue Hospital and is the former director of nutrition at the Pritikin Longevity Center in Santa Monica, Calif. This article was originally published on AnnLouise.com