What a genuine COA does show
A certificate you have checked with the lab shows that the lab received a sample, tested it by the stated methods and got those results on that date. That is useful. A certificate that fails the check, or cannot be checked, shows nothing.
The sampling gap
A lab tests what it is sent. In regulated manufacturing, ICH Q7 says samples should be representative of the batch they come from, with a written plan for how many containers to sample and how much to take.
With research products there is usually no such plan to inspect. You are relying on the seller to have sent a fair sample of the batch you bought.
Who wrote the header
On some reports the header is filled in by the customer, not checked by the lab. Janoshik, for example, lets the customer enter the client name, sample name, manufacturer and batch number. It also sells extra copies of a report with different header details. The lab vouches for the results on the sample. The label on that sample comes from whoever sent it.
After the test
A certificate is a snapshot on the test date. Peptides can break down over time, and storage and shipping after testing are not covered by the report.
What makes the evidence stronger
Educational information only. Nothing here is medical advice, dosing guidance or a recommendation to use any substance. Research peptides are not approved medicines and are not for human or animal consumption. Speak to a qualified professional and follow the law where you are.
