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89
/ 100
Strong
CertaPeptides
Affiliate EUEU vendor with the strongest documentary transparency in the panel: batch-level Janoshik CoAs, named independent lab, viewable before purchase.
Coverage
90%
Verified 8/10 of 10 criteria · checked 2026-07-09
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The most transparent vendor we track: Janoshik CoAs tied to each batch, an independent lab named explicitly, all accessible before purchase and recently dated. Sterility/endotoxin data and a formal complaints policy remain unverified (individual PDFs were not openable behind Cloudflare).
Criterion-by-criterion evidence
Every score below is a recorded, dated observation. Where we could not verify a claim, the criterion is marked Unverified and excluded from the score (but it still counts against coverage).
| Criterion | Wt | Finding | Evidence |
|---|---|---|---|
| Publishes CoAsThe vendor publishes at least one certificate of analysis (CoA) on its own website. | 3 | ✔ Yes | 20 products with third-party CoAs (BPC-157 99.036%, GHK-Cu 99.425%, Tirzepatide 99.596%). Source · 2026-07-09 |
| Batch-level CoAsCoAs are tied to a specific batch/lot number, not a single generic certificate per product. | 3 | ✔ Yes | Unique Janoshik report code per test (BPC-157 → JGERIBLDY5ZW, Tirzepatide → 93A4Y2GEEFFP). Source · 2026-07-09 |
| Third-party lab namedThe name of the laboratory that ran the analysis appears on the CoA. | 2 | ✔ Yes | Lab named explicitly: Janoshik Analytical. Source · 2026-07-09 |
| Independent / accredited labThe lab is independent of the vendor and/or accredited (ISO 17025), or is a recognised independent peptide lab (e.g. Janoshik, MZ Biolabs). | 2 | ✔ Yes | Janoshik is the reference independent peptide lab, with a public code lookup. Source · 2026-07-09 |
| CoA verifiable at sourceThe CoA can be authenticated on the laboratory's own website (e.g. a verification code) — actually tested, not just claimed. | 2 | ◐ Partial | Verify codes and verify.janoshik.com links are published; the endpoint returned a Cloudflare 403 to our bot, so the mechanism is confirmed but an individual lookup was not completed. Source · 2026-07-09 |
| Identity + purity methodsWhich analytical methods are identifiable on the published CoAs. | 2 | ? Unverified HPLC only | HPLC purity shown on the listing; MS not visible on the opened document (conservative — Janoshik usually adds MS). Source · 2026-07-09 |
| Freshness of the latest CoADate of the most recent CoA visible on the site. | 2 | ? Unverified < 3 months | Most recent CoA: Tirzepatide 2026-06-19; several May 2026 dates. Source · 2026-07-09 |
| CoAs accessible before purchase, no accountCoAs can be viewed without a customer account or a prior purchase. | 2 | ✔ Yes | /coa and /verify are public, with no login or account. Source · 2026-07-09 |
| Sterility / endotoxin data publishedSterility or endotoxin (LAL) results are published in addition to purity. | 1 | ? Unverified | Not verified — no evidence on record. |
| Public complaints / recall handlingA public recall/complaint policy, or documented handling of a disputed batch. | 1 | ? Unverified | Not verified — no evidence on record. |
Full scoring rubric on the methodology page. How affiliation is handled: read the disclosure.
Frequently Asked Questions
Is CertaPeptides legit?
On PeptideTrust's 10-criterion transparency scorecard, CertaPeptides scores 89/100 with 90% evidence coverage. That measures how openly it documents third-party testing, not the quality or safety of any product.
Does CertaPeptides publish third-party CoAs?
Yes. CertaPeptides publishes ~20 products with third-party Janoshik CoAs, each carrying a unique report code, and both /coa and /verify are public without an account.
How is the CertaPeptides transparency score calculated?
We score 10 weighted, evidence-backed criteria. Score = 100 × Σ(weight × points) ÷ Σ(weight of verified criteria); coverage = verified weight ÷ total weight. Affiliated and non-affiliated vendors use the exact same rubric.