How to read a peptide COA
Last updated: 21 August 2026
Every serious peptide supplier claims third-party testing. A certificate of analysis (COA) is the document behind the claim — and most buyers never open one. Here is what a COA should contain, what each section means, and how to check ours against the pen in your hand.
The four things to check
Identity: the analysis should name the exact compound and confirm it by mass spectrometry — the measured molecular mass should match the theoretical mass of the peptide sequence.
Purity: expressed as a percentage from HPLC (high-performance liquid chromatography). The number matters, but so does the chromatogram: a clean single dominant peak is the visual signature of a pure product.
Batch: a COA without a batch number is marketing, not evidence. The certificate must be traceable to the specific production lot you received.
Issuer: the testing laboratory should be independent of the seller and named on the document.
Checking a Body Pharm COA
Every Body Pharm batch is tested by an independent laboratory, and every pen carries a QR code linked to its batch. Scan the code — or enter the batch number on the product page — and compare the batch on the certificate to the batch printed on your pen. The full current set of certificates is on the COA index page, as plain PDFs.
Browse all certificates of analysis →
Frequently asked questions
Where are Body Pharm’s COAs?
On the COA index page (linked below) as downloadable PDFs, one per product, and via the QR code on each pen for batch-specific certificates.
What purity should a research peptide show?
Reputable suppliers publish HPLC purity of 98% or higher for the compounds we stock. Treat a missing purity figure, a missing method, or a missing batch number as a red flag.
This page is educational and intended for research and informational use only. It is not medical advice, a treatment recommendation, or dosing guidance, and it makes no claims about outcomes. Body Pharm EU supplies research-grade materials for laboratory use. These statements have not been evaluated by the EMA.