Dr. Drewnowski is the inventor of the Nutrient Rich Foods Index, which rates individual foods based on their overall nutritional value, and the Affordable Nutrition Index, which helps consumers identify affordable healthy foods. He has conducted extensive studies on taste function and food preferences, exploring the role of fat, sugar, and salt on food preferences and food cravings. His studies on bitter taste genetics have explored consumer acceptance of bitter phytochemicals in vegetables and fruit. Dr. Drewnowski has been the leader in studies of spatial epidemiology of diets and health, using innovative GIS approaches to study the geographic distribution of food spending, diet quality and obesity rates. Dr. Drewnowski has served on the Standing Committee to Prevent Childhood Obesity of the Institute of Medicine, National Academy of Sciences and is a public trustee of the International Life Sciences Institute (ILSI), He is the author of over 200 research papers, numerous reviews and book chapters, and a frequent participant and invited speaker at scientific meetings, conferences, and symposia. Dr. Drewnowski has advised government and international agencies, foundations, and think tanks.