Which peptide stores publish a certificate of analysis
Of 350 peptide stores with a COA record (we track 468 storefronts in all), 185 (53%) link a certificate of analysis (COA) on their own website. 72 describe lab testing but link no COA we could find, 60 showed neither, and 33 could not be checked. Last full check: .
COA coverage across tracked stores
| Finding | Stores | Share |
|---|---|---|
| Links a COA, document or batch lookup on its own site | 185 | 53% |
| Describes lab testing, but no COA found on the pages checked | 72 | 21% |
| No COA found on the pages checked | 60 | 17% |
| Could not be checked (site blocked our crawler, or COA pages sit behind a sign-in) | 33 | 9% |
“Could not be checked” is not a finding either way, and “no COA found” is not an accusation that a store does not test: it means no COA page, document or lookup tool turned up on the pages the check looked at. 8 of the unchecked stores put COA pages behind an account sign-in. A store that disallows automated access in its robots.txt is never fetched.
What a published COA does and does not tell you
- A published COA means we found a COA page, document or batch/lot lookup on the store’s public site and recorded the link below with the date we checked.
- We do not read, grade or verify the contents of any report, and we do not rank stores by report quality. A published report is not a safety verdict and not an endorsement.
- Whether a store publishes a COA is one public-record signal among several on each store’s vendor profile; how signals are sourced is explained in how we verify.
Stores that link a certificate of analysis (185)
Questions about this page
What is a certificate of analysis (COA)?
A COA is a document that reports laboratory test results for a specific batch of a material. This page records only whether a store links a COA, COA page or batch lookup on its own public site, and the date we checked.
Is a published COA a safety verdict?
No. We do not read, grade or verify the contents of any report, and we do not rank stores by report quality. A published COA is a public-record signal, not a safety verdict and not an endorsement.
What does "could not be checked" mean?
It is not a finding either way. The store's site blocked our crawler, disallows automated access, or keeps its COA pages behind an account sign-in.
Spot a missing or broken COA link? Submit a correction. A store can claim its profile to update its own details.
Related pages
- Peptide price history and 30/90-day movers
- GLP-1 research peptide prices per mg
- Live sales: sale price vs list price
- Peptide cost calculator (mg × $/mg)
- FDA warning letters naming tracked stores
- How much do peptides cost? Median $/mg by compound class
- Peptide price index: lowest $/mg by compound
- How $/mg is calculated
- Peptide market data for storefront owners