Bonnie Liebman, CSPI's Director of Nutrition, has been with the organization since 1977. She holds an M.S. in nutritional sciences from Cornell University. Liebman has been the key link in formulating CSPI's policies on diet and health. She provides the scientific input on many of the organization's administrative petitions and legislative proposals. Liebman is the author of numerous articles on diet and cancer, heart disease, stroke, diabetes, and other illnesses for Nutrition Action Healthletter and a co-author of Salt: The Brand Name Guide to Sodium. She also served on the advisory committees that issued the American Cancer Society's 2001 and 1996 Guidelines on Nutrition and Physical Activity for Cancer Prevention.