Verified Supplement Data Evidence-based supplement comparisons

Look Up Any Supplement

By Verified Supplement Data · Updated · Powered by NIH DSLD · Methodology

Search the NIH Dietary Supplement Label Database — 207,000+ verified products. See exactly what's in any supplement: ingredients, forms, dosages, and our quality analysis.

What is the NIH DSLD?

The Dietary Supplement Label Database (DSLD) is maintained by the NIH Office of Dietary Supplements. It contains verified label information for over 207,000 dietary supplement products sold in the United States. The data includes:

  • Product name and brand
  • All ingredients with exact forms (e.g., "Magnesium as Magnesium Glycinate")
  • Quantities per serving
  • Serving size and servings per container
  • Daily Value percentages
  • Other ingredients (fillers, binders, coatings)
  • Structure/function claims
  • Market status (on/off market)

How We Add Value

The raw DSLD data tells you what's in a product. We tell you if it's any good. Our tool layers quality analysis on top of the government data:

  • Form quality: Is this a well-absorbed form? Magnesium glycinate vs oxide, D3 vs D2, TG vs EE fish oil.
  • Dose adequacy: Does the amount per serving match what clinical trials actually used?
  • Value analysis: What does this cost per clinically-effective dose compared to alternatives?

For a full quality audit with specific recommendations: Check Your Supplement →

For a personalized stack based on your goals: Supplement Recommender →

Frequently Asked Questions

What is the NIH Dietary Supplement Label Database?

A free, public database of 207,000+ supplement labels maintained by the NIH Office of Dietary Supplements. Contains verified ingredient names, forms, quantities, and manufacturer information from actual product labels.

How do I use this to evaluate my supplement?

Search for your product. The tool shows verified label data from NIH with our form quality analysis overlaid. Green checkmarks = good forms. Red X = poor forms with links to evidence explaining why. For a complete audit with product recommendations, use our audit tool.

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