This page reorganizes documented suppliers by the kind of testing evidence they show rather than by preference or quality. There are three lanes and no scores. The lane a supplier occupies describes who controls the evidence and how much work a reader has to do to verify it — nothing more.
Provider-verified means certificates route to third-party laboratory pages readers can check themselves, so the verification step lives outside the vendor's control. Public documents means vendor-hosted certificates or PDF archives are openly inspectable without a login; they are visible, but the vendor controls the file. Account-forward means evidence exists but requires a login, membership, or direct contact; we confirmed it during review so readers know what to expect before creating an account.
We don't assign scores because we don't test products — we read documents. A score implies a judgment we did not make, and batch quality changes from month to month. Coverage figures describe the share of the catalog with retrievable documentation on the date we reviewed it, not a measure of purity or potency. Readers who want to interpret the underlying paperwork themselves should start with how to read a certificate of analysis and peptide purity explained.
Return to the Supplier Desk for full profiles, or apply for documentation review. Our independence and disclosure rules are documented in Editorial Standards.