Nutrition quackery is one of the most profitable types of quackery. Dietary supplements, weight loss products, herbal remedies, and "sports" foods are not registered with the Food and Drug Administration (FDA). Federal law allows certain claims to be made on the labels of food and dietary supplements. These include claims that show a strong scientific link between a food substance and a disease or health condition. These approved claims can state only that the product may reduce the risk of certain health problems, not cure them. The labels of dietary supplements must ...