PepX

PepX (pepx.org) is a US-based (Zephyrhills, FL) research-peptide supplier whose one clear strength is its lab testing. Its COAs come from Analytical Formulations, Inc. (AFI), a cGLP-certified US lab operating since 2008, and are served through the Purity Analytics digital-certificate portal — each report is cryptographically signed and independently verifiable at verify.purityanalytics.com with no login or Cloudflare wall, which is genuinely easier to check than most vendors' COAs. We pulled three real reports and confirmed them: BPC-157 at 99.9%, Retatrutide at 99.7%, and Semax at 99.9%, each running a full panel (identity, purity, quantitative assay, heavy metals, and microbial).

That public, named-lab, batch-level testing is what our 40% COA factor rewards most, and it anchors the score. PepX pairs it with a disclosed US address (Zephyrhills, FL) and an established, heavily-advertised storefront taking PayPal, Square cards, and ACH. The main gaps are track record and identity: it's newer and hasn't built an independent review footprint yet (not on Trustpilot/Reddit/Eroids), and its AFI certificates use the same YPB lot system seen elsewhere in the market, so it appears to be a white-label reseller rather than the manufacturer of record.