Dr. Willett is a renowned physician, nutrition researcher, and Chair of the Department of Nutrition at the Harvard School of Public Health. He is also a Professor of Medicine at Harvard Medical School. Willett is the principal investigator of the second Nurses’ Health Study, a compilation of studies regarding women’s health and risk factors for major chronic diseases. He has published over 1,000 scientiﬁc articles regarding various aspects of diet and disease and is the second most cited author in clinical medicine. In the public eye, Willett is perhaps best known for his 2001 book Eat, Drink and Be Healthy, which presents nutritional information and recommendations based on the currently available body of nutrition science. Presently, Walter is working within the Harvard School of Public Health’s programs in Tanzania, in eﬀorts around AIDS and nutrition in East and Southern Africa.