Featured Peptide Vendors

US-based supplier with a broad catalog of more than two dozen research compounds. Every batch is third-party tested by an ISO/IEC 17025-accredited lab to a 99%+ HPLC purity standard, with additional heavy-metal (ICP-MS), sterility, and endotoxin screening. Each product links a batch-specific Certificate of Analysis that is downloadable and independently verifiable through the issuing lab’s portal.

US-based research-compound supplier with an openly browsable catalog and per-vial pricing (no account required). Every one of its 25 catalog compounds carries a batch certificate from Accumark Labs in a public COA library; 24 link the certificate from the product page, and the Retatrutide 30 mg lot is verifiable by its AccuVerify code. The certificate we reviewed — a 30 mg Retatrutide lot — is a core panel confirming identity, purity (99.52% against a >98.0% spec), and quantity; it does not include endotoxin, heavy-metal, or sterility testing, and Accumark prints no lab accreditation.

US research peptide supplier that runs four independent test types per batch: purity, endotoxin, heavy metals, and sterility. Extensive transparency on test data and documentation.