Nutritional disease, any of the nutrient-related diseases and circumstances that cause infection in humans. They may embrace deficiencies or excesses in the diet, obesity and eating disorders, and chronic diseases such as cardiovascular disease, hypertension, cancer, and diabetes mellitus. Nutritional diseases also comprise developmental anomalies that can be prohibited by diet, hereditary metabolic syndromes that respond to dietary treatment, the interface of foods and nutrients with drugs, food allergies and intolerances, and potential hazards in the food supply.