How to tell if a peptide COA is real

Updated October 21, 2026

A genuine peptide COA names a lab you can find and contact, carries a report or accession number the lab can confirm, and lists the same lot number and strength as your vial. The quickest test is to look the report up on the lab's own site, or email the lab with its report number and ask whether it matches.

For research use only. This guide explains laboratory documents. It is not medical advice and says nothing about using any compound.

1. Find the lab yourself

Search for the lab by name rather than following a link in the report. A real testing lab has a website, an address and a way to contact it. If no lab by that name turns up, the report can't be checked, whatever it says.

2. Look the report up, or ask the lab

Many labs that test peptides run a lookup where you enter a report, accession or search code and see their copy. If the lab has no lookup, email it the report number and ask whether the result and sample name match. A lab won't always reply, but a lab that confirms a report is strong evidence.

A QR code or link printed on the report is only useful if it opens the lab's own domain. Check the address before trusting what it shows.

3. Match the lot number and the strength

The lot number on the report should be the one on your vial, character for character. The sample strength should match too: a report run on a 10 mg sample says nothing reliable about a 60 mg vial. The same report attached to several products or strengths is a reason to ask questions.

4. Check the dates and the client

A report shows when the sample was received and when it was reported. Dates far older than the lot, or in the future, are a problem. Many reports also name the client who sent the sample. If that is a different business, the report may have been made for someone else.

5. Read the results as numbers

Look for measured values with the method named: purity by HPLC, identity by mass spectrometry, and net content in milligrams. Round figures with no method, or words like "pass" with nothing behind them, give you nothing to check. A chromatogram that shows one clean peak should agree with the purity figure printed beside it.

6. Look for signs of editing

Mismatched fonts, text that sits off its line, blurred areas around the lot number or result, or a logo pasted over a different layout are common signs a PDF was altered. None of them proves fraud on its own, which is why the lookup in step 2 matters most.

7. Compare with the seller's other reports

The same chromatogram picture, the same purity to two decimals, or the same accession number across different lots is a sign the reports were copied rather than run. Real results vary a little from batch to batch.

8. Ask the seller for the full report

A cropped image or a summary table isn't the report. Ask for the complete PDF for your lot number. A seller that has one can send it; a seller that can't is telling you something.

Common questions

Can a peptide COA be faked?

Yes. PDFs can be edited and real reports can be reused for other batches. Confirming the report with the lab that issued it is the most reliable check.

What if the lab doesn't respond?

Then the report is unconfirmed, not necessarily false. Weigh the other checks: lot and strength match, dates, the client name and whether the numbers are internally consistent.

Does a QR code on the report prove it is real?

Only if it opens a page on the lab's own website showing the same report. A QR code can point anywhere.