We read 18,699 supplier certificates from 416 shops
A new scan of the certificates shops post. About 1 in 3 include a contamination test. We have read them, but not yet checked them with the labs.
On 8 October 2026 we finished a new scan of the certificates of analysis that research peptide shops post on their own websites. We collected the files on 23 and 24 September and on 7 and 8 October, and read every one. In total we read 18,699 certificates from 416 shops.
We track 518 shops. 401 of them post at least one certificate we could read. The total of 416 also includes shops we tracked earlier.
About 1 in 3 certificates (33.9%) include a contamination test: a test for bacterial toxins, for sterility or microbes, or for heavy metals. Most of the rest show only purity, identity or amount. 49.3% of the shops post no certificate with a contamination test.
We have collected and read these certificates. We have not yet checked them with the labs. A certificate is a document a shop publishes about its own product. It is not a Peptide Scanner test result.
Supplier pages now link 2,113 certificate files on 241 supplier pages, up from 1,527 files on 161 pages. The new links do not change any supplier's score or position.
Press enquiries: media@peptidescanner.co. We reply within one working day.
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