Most COA guides use made-up examples. This one uses a real certificate: the Accumark Labs report for our GLOW 70mg blend, lot GPP260412-BBG70028, report ID S43G-2L65. You can open the PDF and follow along.
1. The header: who, what and when
| Field | On this COA | What it tells you |
|---|---|---|
| Sample name | GHK-Cu + BPC-157 + TB500 (Thymosin Beta 4) | What was tested |
| Sample code | S43G-2L65 | The report ID used to verify it |
| Received date | 05/27/2026 | When the lab got the sample |
| Published date | 06/05/2026 | When results were issued |
| Matrix type | Peptide blend | The kind of sample |
2. The sample box: declared vs measured
The lab lists the declared identity (GHK-Cu, BPC-157, TB500), the sample size declared on the label (70.0 mg) and the total quantity it actually measured (74.18 mg). The lot code (GPP260412-BBG70028) is the most important line: the results describe this lot only.
3. The results table
| Test | Specification | Result | Status |
|---|---|---|---|
| Identity | GHK-Cu, BPC-157, TB500 | GHK-Cu, BPC-157, TB500 | CONFORMS |
| Quantity | Measure | 74.18 mg | MEASURED |
| Purity | > 98.0% | 99.70% | CONFORMS |
Identity confirms the expected compounds are present. Purity is compared with a specification (here, greater than 98.0%). Quantity is reported as a measurement, not a pass or fail.
4. Page 2: each ingredient on its own
For a blend, the second page breaks the result down by ingredient:
| Analyte | Measured quantity | Purity |
|---|---|---|
| GHK-Cu | 53.07 mg | 99.84% |
| BPC-157 | 10.97 mg | 99.4% |
| TB500 (Thymosin Beta 4) | 10.14 mg | 99.26% |
This is where a blend COA earns its keep. A strong total number can hide a weaker ingredient, so read page 2. On a different lot in our lab results hub, the BPC-157 / TB-500 20mg blend, the total is 98.59% but the BPC-157 line reads 97.86%, and the certificate flags it below the component specification. We publish that result as issued.
5. The chromatogram
The HPLC chromatogram plots the detector signal over time. A single tall, sharp main peak with little else around it is what a high purity percentage looks like on the chart.
6. The verification code
The bottom of the certificate carries the report ID and a QR code. Use them to check the report on the lab’s own site; see how to verify an Accumark COA.
Testing
Our manufacturer tests it twice during production, and we use an independent third-party lab for purity testing. A COA is available on request.
For a general checklist and red flags, see how to read a COA.
FAQ
What does “Total Blend purity” mean on a COA?
It is the HPLC purity of the whole sample. For a blend, the lab also reports the purity of each ingredient separately.
Why can measured quantity differ from the label?
The quantity test measures how much compound was found in the tested sample. The certificate marks it MEASURED and reports the number rather than a pass or fail.
What is the sample code on an Accumark COA?
It is the report ID, such as S43G-2L65. You enter it on the AccuVerify portal to see the original report.
Does one COA cover every lot?
No. A certificate describes one lot. Match the lot code on the COA to the lot on your product.
Is a COA a statement about effects?
No. A COA records what a lab measured in one sample: identity, quantity and purity.
All products listed are sold for laboratory research use only and are not for human consumption.