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-based, veteran-owned supplier built around batch- and lot-level accountability. Every batch is tested by ILS Laboratories, an ISO/IEC 17025-accredited lab, running a Full QC Panel — HPLC purity and identity, heavy metals by ICP-MS, and sterility by PCR — with HPLC conformity checked across three vials per batch rather than a single sample. Every report is independently verifiable at portal.ils-lab.com using the access code printed on it.

US-based supplier with a fully public catalog and no account gating required to browse or buy. Glacier Aminos publishes a public, batch-searchable Certificate of Analysis library, with certificates issued over time by three independent US labs — Forever Young Pharmacy, Freedom Diagnostics, and most recently Kovera Labs, whose reports carry a per-record code verifiable directly at the lab. Testing covers HPLC purity and net peptide content, with the newest lots adding endotoxin, sterility, and heavy-metal screening. Cold-chain shipping is included on every order.

US-based research peptide supplier that tests batches through two independent labs running in parallel — TrustPointe Analytics (Dorr, MI) and Kovera Labs — with many batches carrying certificates from both. Testing covers purity by RP-HPLC (99.7–99.99% across the certificates reviewed), identity by LC-MS, endotoxin under USP <85> (≤0.5 EU/mL), heavy metals by ICP, and rapid sterility screening. Every certificate is independently verifiable on the issuing lab’s own website, though the certificates themselves carry no laboratory accreditation mark.