How to use PeptideSupply

How to use it

The lowest price is not automatically the best product or the best choice.

Researching the COAs and the ethics of a company is essential. We show the best prices, not the best products. Searching and comparing, also on the supplier’s own website, is part of the game.

How to check a COA

1. Lab — Is the laboratory independent and verifiable?
2. Batch — Does the batch or lot number match the vial or product listing?
3. Identity — Look for LC-MS or mass spectrometry. HPLC alone does not confirm identity.
4. Purity & content — Check the HPLC purity result and the actual peptide content in mg.
5. Date & verification — Verify the report ID or QR code on the lab’s own website. Check that the test is recent.

No batch number, no identity test, or no verifiable laboratory? Treat the listing as unverified.

The suppliers behind the offers

Discover the suppliers behind the offers on our Suppliers page at PeptideCompare, including our Trusted Performer listings.

Purity does not prove sterility, safety, or suitability for human use. Research use only — not for human use.