The Dietary Supplements Labels Database offers information about ingredients in more than two thousand selected brands of dietary supplements. It enables users to determine what ingredients are in specific brands and to compare ingredients in different brands. Information is also provided on the health benefits claimed by manufacturers. These claims by manufacturers have not been evaluated by the Food and Drug Administration. Companies may not market as dietary supplements any products that are intended to diagnose, treat, cure or prevent any disease. Ingredients of dietary supplements are linked to other National Library of Medicine databases such as MedlinePlus and PubMed to allow users to understand the characteristics.