Every vial we sell has a certificate of analysis, or COA, from an outside lab. It is the one document that tells you what is actually in the vial. Most people never open it, and the ones who do are not sure what they are looking at. This guide fixes that in five minutes.
What a COA is, and who writes it
A COA is a short lab report for one batch of one product. An independent testing lab receives a sample, runs it through its instruments and writes down what it found. The supplier did not write the numbers. That is the whole point: the lab has no reason to flatter the product.
Our reports are published on the Lab Tests (COA) page, sorted by product. Each one carries the batch number printed on the vial label, so you can check your own vial against its report.
The lines that matter
Sample name and batch (lot) number. The name should match the product and the strength on the label, for example “BPC-157, 10 mg”. The batch number must match the one on your vial. A COA with no batch number could belong to anything.
Test date and lab. You want a named lab and a date. A report that is years old or has the lab name blanked out tells you nothing about the vial you hold today.
Identity. This confirms the compound is the right molecule. Labs use mass spectrometry (often written as LC-MS or MALDI-TOF) to measure the molecular mass and compare it to the expected value. The two numbers should agree closely. A match here means “this is BPC-157”, not something with a similar name.
Purity. This is the headline number, usually from HPLC. The lab separates the sample into its parts and measures how much of the total is the target peptide. 99.2% purity means 99.2% of what was detected is the right molecule and 0.8% is something else, usually fragments or slightly altered versions of the same peptide. Our purity guide goes deeper on this.
Net peptide content. Not every COA shows this, but it is worth knowing. Lyophilised powder is not 100% peptide by weight. Some of the mass is water and the salt left over from manufacturing. Net content tells you how much of the stated milligrams is active peptide.
Appearance. Usually “white lyophilised powder”. If your vial looks very different from the description, ask before you use it.
How to check your own vial in one minute
- Read the batch number on the label.
- Open the COA page, find the product, and open the report with the same batch number.
- Check that the name, strength and batch all match.
- Look at identity (mass matches) and purity (the percentage).
If anything does not line up, contact us with the batch number and we will sort it out.
Red flags on any supplier’s COA
- No batch number, or a batch that does not match the vial.
- No lab name, or a report that is clearly a screenshot with parts cropped out.
- Purity shown as exactly 100%. Real instruments do not report that.
- One report reused across many products or many months.
- Purity shown but no identity test. A pure sample of the wrong molecule is still the wrong molecule.
A good COA is boring. It names the lab, the date, the batch, the method and the result. That is exactly what you want.
All products on this site are sold for laboratory research only. Nothing here is medical advice.
