Peptide COA Verification Guide
How to Ensure Purity and Spot Fake Lab Reports
In the grey market of research peptides, a Certificate of Analysis (COA) is the only proof of what is actually in the vial. However, forged COAs are incredibly common. This guide teaches you how to independently verify them.
What is a COA?
A Certificate of Analysis (COA) is a document issued by an analytical laboratory (such as Janoshik or MZ Biolabs) confirming that a specific batch of a product meets its specifications. For peptides, a COA should verify two critical things: Purity (is it 99%+ pure?) and Quantity (does the 10mg vial actually contain 10mg?).
The 4-Step Verification Process
Find the Verification Key: Legitimate testing labs provide a unique verification key or barcode on the COA document.
Go to the Lab's Official Site: Do NOT scan a QR code or click a link provided by the vendor. Manually type the lab's known URL (e.g., janoshik.com/verify) into your browser.
Enter the Key: Input the verification key from the PDF/Image into the lab's official portal.
Compare the Documents: The document generated by the lab's database MUST perfectly match the document provided by the vendor. Look closely at batch numbers, dates, and purity percentages.
Red Flags for Fake COAs
Missing Verification Key
Photoshop Artifacts
In-House Testing
Old Dates
Why Quantity Matters as Much as Purity
Many vendors will show a COA proving 99.5% purity, but they obscure the "Quantitative Analysis." A vial might be 99.5% pure Tirzepatide, but if the vial was supposed to contain 30mg and only contains 15mg, you have been scammed. Always demand a COA that shows both qualitative (purity) and quantitative (mass) results.
Community Verification
The gold standard is independent community testing. Groups on Telegram or Discord often crowdfund blind tests sent directly from a buyer to Janoshik to ensure the vendor didn't cherry-pick a "golden vial" for their own COA.
Guide FAQs
Janoshik is a well-known analytical chemist operating out of the Czech Republic. His independent lab is highly trusted in the performance-enhancing and peptide communities for unbiased testing.
Yes. A fake COA can have a QR code that links to a fake verification website designed to look like the real lab. Always type the URL manually.
Track Your Batches in Shotlee
Shotlee allows you to log the specific batch numbers and vendors of the peptides you use, making it easy to correlate results or side effects with a specific COA.
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