The ScanCheck Index
The state of third-party supplement testing, computed live from 21,543 public lab certificates across 9 certification programs. No survey, no estimates: every number on this page is an aggregate of published certification records. Free to cite with attribution (CC BY 4.0).
Key findings
- 21,543 independent lab certificates are publicly verifiable across 9 certification programs. Most shoppers never see any of them.
- Certification is top-heavy: the 20 most-certified brands hold 7,870 certificates, 37% of the entire public record. The long tail of brands publishes little or nothing.
- 4,068 labeled sellers appear in the record, but only 1,197 maintain 2 or more public certificates. A single certificate is a snapshot; a testing program is a track record.
- Only 51% of public certificates disclose a test date at all, and 59% of the dated ones are from the last 12 months. "Certified" often means certified once, years ago.
- Under 1% of certificates publish a quantified potency result. The rest certify pass/fail only, so consumers cannot compare actual label-claim accuracy between products.
Certificates by program
| Program | Certs | |
|---|---|---|
| Informed-Sport | 12,107 | |
| NSF Certified Dietary | 2,932 | |
| NSF Certified for Sport | 2,571 | |
| PowderHaus Labs | 2,228 | |
| Informed-Choice | 907 | |
| NSF | 467 | |
| USP Verified | 159 | |
| Clean Label Project | 154 | |
| Blueprint third-party | 18 |
Disclosed test dates by year
| Year | Certs | |
|---|---|---|
| 2020 | 1 | |
| 2021 | 1 | |
| 2022 | 16 | |
| 2023 | 210 | |
| 2024 | 1,461 | |
| 2025 | 4,140 | |
| 2026 | 5,061 |
Only the 51% of certificates that publish a test date appear here. The rest certify without disclosing when testing happened.
What gets tested
| Category | Certs | Share | |
|---|---|---|---|
| Other / uncategorized | 16,386 | 76% | |
| Protein products | 1,840 | 9% | |
| Herbal / botanical | 1,311 | 6% | |
| Minerals | 1,211 | 6% | |
| Vitamins | 795 | 4% |
Most-certified brands
| # | Brand | Public certs |
|---|---|---|
| 1 | Nootropics Depot | 2,228 |
| 2 | Now Foods | 569 |
| 3 | Applied Nutrition | 510 |
| 4 | Nordic Naturals | 478 |
| 5 | Precision Engineered | 392 |
| 6 | Science In Sport | 381 |
| 7 | Etixx | 354 |
| 8 | Raw Nutrition | 325 |
| 9 | Heart & Soil | 307 |
| 10 | KAGED | 301 |
| 11 | Herbalife | 299 |
| 12 | CELSIUS® | 265 |
| 13 | ATP Lab | 238 |
| 14 | BULK | 229 |
| 15 | Biogen | 215 |
| 16 | MAURTEN | 176 |
| 17 | AN | 171 |
| 18 | MNSTRY | 146 |
| 19 | Woodbolt Distribution LLC DBA Nutrabolt | 145 |
| 20 | Grenade | 141 |
Full list: all 1197 brands with a public testing record.
Methodology
The index aggregates certification records published by independent programs (Informed-Sport, NSF Certified Dietary, NSF Certified for Sport, PowderHaus Labs, Informed-Choice, NSF, USP Verified, Clean Label Project, Blueprint third-party). Records are deduplicated per verification URL, matched to a labeled seller, and refreshed continuously as programs publish new certificates. "Brands" counts sellers with at least two public certificates under a normalized name. Counts reflect the public record only: a brand may run internal testing it does not publish, and this index cannot see it. That gap is the point. Updated 2026-09-22.
Cite this report
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