How to read a Janoshik peptide COA test report Durham Peptides Canada A Janoshik Certificate of Analysis is the document every serious Canadian peptide buyer should know how to read. It's the primary piece of evidence that a peptide is what the supplier claims it is — manufactured to research-grade purity, correctly identified by molecular weight, and traceable to an independent laboratory with a verifiable test record. But COAs contain specialized analytical data, and for researchers who...