Which peptide vendors actually prove their quality?
PeptideTrust scores research-peptide vendors on one thing: how openly they document third-party testing. Every score is built from 10 weighted criteria, and every criterion links to the exact evidence we checked.
The transparency scoreboard
How scoring works →Ranked strictly by transparency score. The score measures documentary transparency — whether a vendor publishes batch-level certificates of analysis (CoAs) from a named, independent lab, verifiable at the source. It is not a measure of product quality or safety.
| # | Vendor | Score | Evidence coverage | Flags | |
|---|---|---|---|---|---|
| 1 | Particle Peptides Worldwide · 10/10 verified | 93/100 |
100%
|
No affiliation | View CoAs → |
| 2 | Limitless Life Nootropics US · 9/10 verified | 91/100 |
95%
|
No affiliation | View CoAs → |
| 3 | CertaPeptides EU · 8/10 verified | 89/100 |
90%
|
Affiliate | View CoAs → |
| 4 | BioLongevity Labs US · 10/10 verified | 85/100 |
100%
|
No affiliation | View CoAs → |
| 5 | Sports Technology Labs Worldwide · 9/10 verified | 80/100 |
95%
|
No affiliation | View CoAs → |
| 6 | Pure Rawz Worldwide · 10/10 verified | 75/100 |
100%
|
No affiliation | View CoAs → |
| 7 | Core Peptides US · 3/10 verified | —/100 |
30%
|
Provisional No affiliation | View CoAs → |
| 8 | SwissChems Worldwide · 9/10 verified | 47/100 |
90%
|
Affiliate | View CoAs → |
| 9 | AminoClub US · 3/10 verified | —/100 |
30%
|
Affiliate Provisional | View CoAs → |
Defunct & seized vendors
Kept as a historical reference and a warning. These brands have closed or been seized; any site trading under these names today is unverified. Do not treat them as buying options.
| Vendor | Score | Status | |
|---|---|---|---|
| Amino Asylum US | 5/100 | Defunct | View CoAs → |
| Peptide Sciences US | —/100 | Defunct | View CoAs → |
The 10 criteria
Each vendor is scored on these weighted, observable criteria. Higher weights carry more of the score. We only record verifiable, dated facts — never judgment about a product's safety or effectiveness.
Publishes CoAs
The vendor publishes at least one certificate of analysis (CoA) on its own website.
Batch-level CoAs
CoAs are tied to a specific batch/lot number, not a single generic certificate per product.
Third-party lab named
The name of the laboratory that ran the analysis appears on the CoA.
Independent / accredited lab
The lab is independent of the vendor and/or accredited (ISO 17025), or is a recognised independent peptide lab (e.g. Janoshik, MZ Biolabs).
CoA verifiable at source
The CoA can be authenticated on the laboratory's own website (e.g. a verification code) — actually tested, not just claimed.
Identity + purity methods
Which analytical methods are identifiable on the published CoAs.
Freshness of the latest CoA
Date of the most recent CoA visible on the site.
CoAs accessible before purchase, no account
CoAs can be viewed without a customer account or a prior purchase.
Sterility / endotoxin data published
Sterility or endotoxin (LAL) results are published in addition to purity.
Public complaints / recall handling
A public recall/complaint policy, or documented handling of a disputed batch.
Learn how to read the evidence
How to read a peptide CoA
What each section of a certificate of analysis means, and the red flags that separate a real CoA from a decorative one.
HPLC vs mass spectrometry
Why purity and identity are different questions — and why the strongest CoAs report both HPLC and MS.
The independent peptide labs
Janoshik, MZ Biolabs, TrustPointe and others — who the third-party labs are and how to verify a certificate at the source.