SupLabel is a free online supplement label comparison engine that helps people examine dietary supplement products using data from the NIH Dietary Supplement Label Database (DSLD). Rather than making health claims or offering medical guidance, the site presents factual information from supplement labels, enabling visitors to compare ingredients, dosages, product forms, and daily values across brands.

The database includes 94,708 products from 5,711 brands and covers 39,752 unique ingredients. Users can search for a single ingredient or combine multiple ingredients, browse product categories, and review statistics and recently added products. SupLabel says it standardizes ingredient names, units, and dosage information to make comparisons easier. Its data source is the public-domain DSLD, maintained by the National Institutes of Health Office of Dietary Supplements, and the site reports that new labels are added weekly.

SupLabel is free to use. It may earn commissions through qualifying retailer purchases, but states that affiliate links do not affect the label data displayed.