Interactive compare · NIH DSLD · 113,539 labels
Compare two labels side by side
Line up any two products, manufacturers, or ingredients from the NIH Dietary Supplement Label Database: 113,539 labels, 4,271 brands, 4,622 ingredient groups. No marketing copy, no paid placement.
What these comparisons unlock
Every comparison reads live DSLD filings: 113,539 labels, 57.7% still on-market, and 74.8% carrying a rich (≥5 ingredient) label. Open a ready-made matchup or start from any entity page.
- 113,539
- DSLD labels indexed
- 57.7%
- Still on-market
- 74.8%
- Rich ingredient lists
- 4,271
- Brands available
Counts are computed live from the portal DB (NIH DSLD product labels). Comparisons are informational only, not medical advice.
What's in the archive
Tool set
Open any supplement, brand, or ingredient page and use its compare control, or jump into a ready-made matchup below.
Popular brand matchups
Largest manufacturers in the database, head to head by catalog size.
- BulkSupplements.com vs NOW 4,324 vs 3,519 products
- Douglas Laboratories vs Herb Pharm 2,177 vs 1,755 products
- Nature's Way vs Carlson 1,749 vs 1,587 products
- Herbal Terra vs Jarrow Formulas 1,564 vs 1,517 products
- The Vitamin Shoppe vs Solgar 1,364 vs 1,035 products
- Bluebonnet vs Country Life 965 vs 965 products
Common ingredient matchups
Most-listed active ingredients, compared by how many products contain each.
How comparisons work
Each comparison reads the two entities' records directly from the NIH DSLD and lines up their shared attributes. The database records what manufacturers print on labels, not independent laboratory testing, and a brand's catalog here reflects the filings on record rather than its full historical SKU count. Comparisons are informational only and not medical advice; see our health & appropriate-use disclaimer.
Every figure on PlainVitamins is rendered directly from the NIH Dietary Supplement Label Database (DSLD), no number is typed in by an editor. This page draws directly on the NIH DSLD; no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.
Download the catalog statistics extract cited on this page: dsld-catalog-statistics.csv (CC0).