The science and profession of and dietetics is based on the application of foods and nutrition to promote health and treat disease. Most dietitians and nutritionists work in , community, public health, or food service settings. Others work as consultants or researchers, in the food industry, in university, worksite, medical school, home health, or fitness center settings. Some persons work for world or regional health organizations. At least a bachelor's degree in dietetics, foods, and nutrition is needed to practice as a dietitian or a nutritionist. Dietetic technicians need an associate's degree.