Documentation
How to read a peptide COA
A certificate of analysis, or COA, is a laboratory document about a sample or batch. It can be useful documentation. It is not proof that every future batch, product line, or vendor claim is the same.
Start with traceability
Look for a product name, batch or lot identifier, test date, the laboratory name, methods, and reported results. Then check whether the document can be connected to the item offered on the vendor page. A generic report with no visible batch link gives less information than a document tied to a stated lot.
Read the method beside the result
A percentage without a named method is incomplete context. Analytical methods answer different questions. For synthetic peptides, regulators expect methods to address identity and peptide-related impurities. A reader should avoid treating one result as a broad safety, efficacy, or clinical-quality claim.
What the WTB label means
“Independent COA listed” means WTB found a vendor-stated COA record or link and recorded it. The green label shows the lab name when it is in the data. It does not certify a vendor or guarantee a product.