How to Verify a Peptide COA in 4 Steps
For in vitro laboratory research use only. This article covers document verification only. Peptix makes no claims about the effects of any material it sells.
Reading a Certificate of Analysis and verifying one are two different jobs. Reading tells you what the report says. Verifying tells you whether the report belongs to your vial and really came from the lab named on it. This post covers verification only. For what each field means, see our guide on how to read a certificate of analysis.
You need three things: the vial or box, the supplier’s COA page, and a web browser.
Step 1: Find the lot number on your vial
The lot number should be printed on the vial label or the box. Peptix lot IDs look like this: BC-20260521-01. Write it down exactly as printed, including letters, numbers and hyphens.
If there is no lot number on the vial or box, stop here and contact the supplier. Without a lot number, a certificate cannot be matched to the material.
Step 2: Find the same lot ID on the COA page
Open the supplier’s COA page and look for the lot ID you wrote down. On the Peptix peptide COA lookup page, each current lot is listed with its product name, lot ID, testing lab, report date, method and result.
Current Peptix lots are:
| Product | Lot ID | Purity (HPLC-UV) | Identity (LC-MS) | Measured net content per COA |
|---|---|---|---|---|
| BPC-157 10 mg | BC-20260521-01 | 99.26% | BPC-157 | 12.71 mg (labeled 10 mg) |
| TB-500 10 mg | TB-20260521-01 | 99.79% | thymosin beta-4 | 12.15 mg (labeled 10 mg) |
| BPC-157 / TB-500 20 mg | BB-20260521-01 | 99.15% | BPC-157 and thymosin beta-4 | 13.68 mg BPC-157 + 11.17 mg thymosin beta-4 (labeled 10 mg + 10 mg) |
Source: the Peptix COA page, Freedom Diagnostics reports dated July 8, 2026. A certificate reports results for the sample tested. It is not a guarantee for other lots.
Pack-of-5 products are currently supplied from the same lots as the single vials. Lots change over time.
Step 3: Match the lot ID character by character
Open the certificate itself and find the lot number printed on it. Compare it with the number on your vial one character at a time. It should be identical.
Small differences matter. Common things to watch for:
- A different date segment (for example 20260521 versus 20260512)
- A different suffix (-01 versus -02)
- A different product prefix (BC, TB or BB on Peptix lots)
- Letters that look like numbers, such as O and 0, or I and 1
If the lot on your vial isn’t listed, or doesn’t match, contact Peptix support with your order number and the lot number before using the material.
Step 4: Confirm the report on the lab’s own site
A certificate shown on a seller’s website is a copy. The strongest check is to confirm the report with the laboratory that issued it.
Each Peptix certificate lists a search code. For example, the current BPC-157 10 mg lot has search code Pept2607060380. Enter the search code on the Freedom Diagnostics COA lookup (linked from our COA page) and check that the lab’s record shows:
- the same lot number
- the same report date
- the same results
If the lab’s record matches the certificate, you have confirmed the report came from the lab named on it, for the lot you hold.
What verification does not do
Verification confirms that a report is genuine and belongs to your lot. It does not extend the report’s scope. A certificate reports results for the sample tested. It is not a guarantee for other lots.
Keep a record
Once verified, save a PDF copy of the certificate with your order record, along with the lot ID, search code and the date you checked. If a question comes up later, you will have everything in one place.
Peptix products with lot certificates include BPC-157 10 mg, TB-500 10 mg and the BPC-157 / TB-500 20 mg blend. Browse all research peptides.
Frequently asked questions
How do I verify a peptide COA?
Find the lot number on your vial, find the same lot ID on the COA page, match it to the certificate character by character, then confirm the report on the testing lab’s website using its search code.
Where is the lot number on a Peptix vial?
It should be printed on the vial label or the box, in a format such as BC-20260521-01.
What is a COA search code?
A search code identifies the submission at the testing lab. You can enter it on the lab’s own COA lookup to confirm the report.
What if the lot number doesn’t match?
Contact Peptix support with your order number and the lot number before using the material.
For research use only. Not for human or animal use.
