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Provisional
Core Peptides
USPopular US budget/bulk vendor but opaque to automation: CoAs are lazy-loaded images and no lab is named publicly.
Coverage
30%
Verified 3/10 of 10 criteria · checked 2026-07-09
Provisional score. Under half of the weighted criteria could be verified for this vendor, so treat the score as indicative only. Missing evidence counts against coverage, not toward a passing grade.
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A popular US budget/bulk vendor that is opaque to automated checking: CoAs are lazy-loaded NitroPack images that do not render server-side, and no lab is named publicly. Manual monitoring; many criteria cannot be verified without a JS browser.
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 | ◐ Partial | A per-variant CoA section exists but images lazy-load (not server-rendered); also "on request by email + order number". An independent unboxing confirms a real HPLC+MS. Source · 2026-07-09 |
| Batch-level CoAsCoAs are tied to a specific batch/lot number, not a single generic certificate per product. | 3 | ? Unverified | Not verified — no evidence on record. |
| Third-party lab namedThe name of the laboratory that ran the analysis appears on the CoA. | 2 | ? Unverified | Not verified — no evidence on record. |
| 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 | ? Unverified | Not verified — no evidence on record. |
| 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 | ? Unverified | Not verified — no evidence on record. |
| Identity + purity methodsWhich analytical methods are identifiable on the published CoAs. | 2 | ? Unverified | Not verified — no evidence on record. |
| Freshness of the latest CoADate of the most recent CoA visible on the site. | 2 | ? Unverified | Not verified — no evidence on record. |
| CoAs accessible before purchase, no accountCoAs can be viewed without a customer account or a prior purchase. | 2 | ✔ Yes | The product page and CoA section load fully while logged out; only the CoA image itself lazy-loads. 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 | ✘ No | A 30-day refund window only; no recall/complaint/disputed-batch policy. Source · 2026-07-09 |
Full scoring rubric on the methodology page. How affiliation is handled: read the disclosure.
Frequently Asked Questions
Is Core Peptides legit?
On PeptideTrust's 10-criterion transparency scorecard, Core Peptides scores 58/100 with 30% evidence coverage (provisional — under half of the weighted criteria could be verified). That measures how openly it documents third-party testing, not the quality or safety of any product.
Does Core Peptides publish third-party CoAs?
Partially. A per-variant CoA section exists but the certificates are lazy-loaded images (also offered "on request by email"), so they could not be verified programmatically.
How is the Core Peptides 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.