DSLD: The NIH Dietary Supplement Label Database | Dose Track
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Dietary Supplement Label Database (DSLD)

Also called DSLD, NIH supplement label database, NIH DSLD · Reviewed

Definition: The Dietary Supplement Label Database (DSLD) is a free NIH database, run with the Office of Dietary Supplements, that records what the labels of US dietary supplements say: ingredients, amounts per serving and directions. A 2024 paper by NIH authors and others put it at over 165,000 labels.

What is in it

On 2026-10-28 the DSLD public search returned 214,780 label records. A 2026 study that counted vitamin B6 doses used the database's on-market flag and noted that DSLD keeps separate records for one product with a different package size, label image or version, so records are not the same as products.

Researchers use it to find and count the products whose labels list an ingredient. The 2024 paper tested it this way for bee products such as propolis, bee pollen and royal jelly, and found them on relatively few labels.

What it cannot tell you

  • It records what labels say. It is not a lab test of what is in the bottle; for that, see certificate of analysis.
  • The 2024 paper found that for some ingredients, such as bee products, labels give no amounts, so the data can only show whether an ingredient is present.
  • The 2026 study checked raw records, set aside 12 inconsistent ones and corrected 21 with mis-encoded serving data.

Why it matters for your log

Many supplements share ingredients, and amounts add up across products. Looking up each label and logging the brand, serving and amount you take shows the total from all of them.

Read more on Dose Track: Herbal supplements and medicines · Biotin and blood tests · Lab testing and COAs

General education drawn from labels and published studies, not personal medical advice. Your prescriber, pharmacist and the label that came with your product are the final word.
Dietary supplementA dietary supplement , under US law (21 U.S.C. 321(ff)), is a product intended for ingestion to supplement… Structure/function claimA structure/function claim is a statement on a dietary supplement label about how an ingredient affects… Certificate of analysis (COA)A certificate of analysis (COA) is a document listing test results for one batch (lot) of a product: what… New dietary ingredientA new dietary ingredient (NDI) is a dietary ingredient that was not marketed in the United States before…

Frequently asked questions

What is the DSLD?+
It is a free NIH database of the labels of dietary supplements sold in the US, with ingredients, amounts and directions as printed on each label.
Does the DSLD test what is in a supplement?+
No. It records what the label says. Lab tests such as a certificate of analysis are what check the contents.

Sources

  1. NIH Office of Dietary Supplements: Dietary Supplement Label Database (DSLD)
  2. Durazzo A et al. Opportunities and challenges in using NIH's Dietary Supplement Label Database for research on non-nutrient ingredients. PharmaNutrition 2024;27:100377 (PubMed 39007096)
  3. Staiger B. Vitamin B6 doses on United States dietary supplement labels relative to the tolerable upper intake level: a census of the NIH DSLD. Cureus 2026;18(10):e118244 (PubMed 42903915)

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