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No. PeptidePrices is an independent price-comparison and vendor-review platform. We don't sell anything ourselves — we track what other vendors charge and score the available evidence with a published rubric. Buying happens on each vendor's own site.

We manually check each vendor's published Certificates of Analysis against the lab named on the COA (Janoshik, Colmaric, Vanguard, Freedom Diagnostics, MZ Biolabs, etc.). For vendors that offer batch-linked QR codes, we verify a sample batch ID matches the lab's database. Mismatches get flagged publicly on the vendor profile.

Certificate of Analysis — an independent lab report confirming a peptide's purity (usually via HPLC), identity (mass spec), and safety parameters (endotoxin, sterility, heavy metals). Named, batch-linked, publicly available COAs account for 40% of our vendor evidence score.

Every 24 hours. Our scrapers check each vendor's product pages daily. Every listing on the site shows when it was last verified — usually within the last day.

Legal status depends on the compound, product, intended use, seller conduct, and jurisdiction. A research-use-only label does not establish that every sale, import, or use is lawful. Consult qualified counsel about a specific transaction.

Some vendor links are affiliate links, which means we may earn a commission on qualifying purchases at no extra cost to you. Vendor evidence scores use our published rubric (40% COA / 20% reputation / 20% transparency / 20% operations). Affiliate status has no effect on a vendor's score or position — the full disclosure is in our site footer and at /about.

A high score means the reviewed evidence is stronger across COAs, reputation, transparency, and operations. It is not a guarantee of product quality, safety, or suitability. Match the exact product and lot to its batch COA and review the underlying findings before ordering.