Analysis
Third-party seals on supplement labels: how many carry which
9,172 of the 116,682 products in the NIH label database (8%) print at least one of nine certification seals on their label (DSLD version 9.4.0, January 2026). The USDA Organic seal is the most common, on 3,900 products; contents and manufacturing seals (USP Verified, NSF) appear on 1,779, and sport-testing seals on 1,333.
Published by PlainVitamins on ; written with AI tools under the editorial policy, every figure computed from the label database.
Which seals appear, and how do you check one?
Products printing each seal
Products by their current label; one product can print several seals.
| Seal | Products | On the market | Check a product |
|---|---|---|---|
| USDA Organic seal | 3,900 | 3,229 | the USDA Organic Integrity Database (certified operations) |
| Certified gluten-free (GFCO) | 2,295 | 1,878 | GFCO's site |
| Certified Vegan (Vegan Action) | 1,508 | 1,120 | Vegan Action's certification pages |
| NSF certified (contents or GMP) | 1,351 | 1,092 | NSF's certified dietary supplements listing |
| Informed Sport or Informed Choice | 1,086 | 828 | the Informed Sport product search |
| USP Verified mark | 374 | 301 | USP's list of verified products |
| NSF Certified for Sport | 158 | 93 | the NSF Certified for Sport product search |
| BSCG Certified Drug Free | 96 | 75 | BSCG's site |
| Non-GMO Project Verified | 76 | 64 | the Non-GMO Project product search |
Source: NIH ODS Dietary Supplement Label Database version 9.4.0, current labels. Download the data (CSV).
How this was measured
A product counts for a seal when its current label's seals and symbols statement, as DSLD transcribes it, names that seal. Products are counted once per seal.
Limits
A seal on a label is the label's claim; DSLD does not verify certifications and neither does this site. Each certifier keeps its own searchable list, linked from the seal pages. Seals printed on the carton but not transcribed are missed.
Sources
The data
One row per seal: products, of them on the market. Download the CSV. How the labels are grouped and read: methodology.
Other analyses
- Supplement labels above the adult upper limit, nutrient by nutrientWhich nutrients most often pass the adult Tolerable Upper Intake Level at the most servings a label allows, and on which products.
- How supplement amounts compare with the Daily ValueFor each nutrient with an FDA Daily Value: the amount the typical product lists per serving, and how many products give five times the DV or more.
- Proprietary blends: how many supplement labels do not disclose their amountsHow many products list a proprietary blend whose ingredient amounts are not disclosed, by product type and by brand.
- Vitamin D amounts on supplement labels, by yearHow the amount of vitamin D per serving has moved on labels entered into the NIH database each year since 2011.
- Which forms of magnesium, B12, folate and other nutrients supplements useOxide or glycinate, cyanocobalamin or methylcobalamin: how many products list each form of twelve nutrients, and at what amounts.
- Gummies, tablets, capsules: how amounts differ by physical formThe median amount per serving of ten common nutrients in gummies, tablets, capsules, softgels, liquids and powders.