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
Red Flags for Fake COAs
Missing Verification Key
If a COA lacks a way to independently verify it on the testing lab's website, it is useless.
Photoshop Artifacts
Look for misaligned text, different fonts used for the purity percentage, or dates that look pasted over.
In-House Testing
"In-house" COAs generated by the vendor themselves are a massive conflict of interest and cannot be trusted.
Old Dates
A COA from 2024 does not prove the purity of a batch manufactured in 2026. Always check the test date against your batch number.
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.
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.