How to read a peptide COA
A certificate of analysis (COA) is a lab's report on a specific batch. It only tells you something if you know what each line means — and if it's tied to the batch in your hand. Here's every field on a Veyvora (Asterion Analytics) COA, and what to check.
identity — is it the right compound?
The top block names the product, its chemical name, CAS number, and molecular formula & mass. In the results table, the Identification row is confirmed by LC-MS (liquid chromatography–mass spectrometry) and should read Conforms. Identity is the first thing to confirm: a pure sample of the wrong molecule is still the wrong molecule.
batch & dates — does it describe your pen?
The batch / lot number is the most important field for a buyer. It must match the lot on your pen — otherwise the certificate describes a different sample. The manufacturing date and retest / expiry date tell you how current the result is.
purity & content — how much is really there?
- Purity (HPLC) — the proportion of the sample that is the target peptide, by high-performance liquid chromatography. Veyvora's specification is ≥ 98.0%.
- Peptide content — how close the actual amount is to the label, typically specified at 95–105%. This is the field that catches underdosing.
- Chromatogram — the HPLC trace itself; one dominant, well-resolved peak is what a clean result looks like (see what HPLC purity does and doesn't prove).
the safety panel — contaminants
- Water content (Karl Fischer) — moisture in the sample.
- Heavy metals (ICP-MS) — elemental contaminants, against a ppm limit.
- Endotoxin (LAL test) — bacterial endotoxin, against an EU/mg limit.
Each should report a measured value inside its specification.
handling & provenance
The COA also states appearance (e.g. a clear, colourless solution) and storage conditions (cold, protected from light and moisture), and is signed and dated by the tester. The client field ties the document to Veyvora.
what to actually check
- Does the lot number match your pen?
- Does Identification conform (LC-MS)?
- Is HPLC purity at or above spec?
- Is peptide content within range (not underdosed)?
- Are the safety results inside their limits?
- Is the certificate current (before retest date)?
Red flags: no batch number, no lab named, a purity claim with no chromatogram, or a certificate that can't be matched to your specific lot.
research use only
Reading a COA is quality verification, not usage guidance. Veyvora compounds are for laboratory research use only — not medicines, and not for human or veterinary consumption.
