Buyer guides

Three ways to check a peptide store before you buy: test its COA, see how we grade stores, or look the store up.

• Check a COA for red flags

  Upload a Certificate of Analysis and we flag what we look for: no independent lab, no batch number, HPLC without mass spec, suspiciously perfect purity, and COAs reused across stores.

• How the Cerience Grade works

  The factors, weights and red-flag caps behind every grade from A to F.

• Is this store legit?

  Type a store’s name or domain to see its Cerience Grade and a link to the full review.