The Academy of Nutrition and Dietetics is a professional organization for registered dietitian nutritionists. It is the largest organization of food and nutrition professionals in the world. There are a number of synonyms for the Academy of Nutrition and Dietetics, including the American Dietetic Association, the Academy of Nutrition and Dietetics Foundation, the Food and Nutrition Conference and Expo, and the Commission on Dietetic Registration. All of these names refer to the same core organization, which serves to promote the science of nutrition and dietetics and to support professionals in the field through education, advocacy, and research.