How to verify a Vanguard Laboratory COA
Check a certificate with the laboratory that issued it, not with the seller. These are the steps we use ourselves (check L3 in How we rate). Research use only.
- Certificates confirmed
- 59
Certificates confirmed
- Vendors confirmed
- 5
Vendors confirmed
Four steps
Find the code on the certificate
Each certificate prints a report ID.
Open the laboratory's own lookup
Search the report ID at verifiedbyvanguard.com. Type the address yourself rather than following a link from the seller, and make sure the page is on the laboratory's own domain.
Compare the result with the vendor's copy
A real ID returns the report with the laboratory's PDF. The product, lot, client name, test date, purity and quantity should all match; any difference in these is a material difference.
Run the control check
An invented ID returns 404 (not found). Change one character of a real code and look it up again: a lookup that answers every code proves nothing.
verifiedbyvanguard.com/search → (opens in new tab)
Our check (L3, pass): On 2026-10-22 verifiedbyvanguard.com returned report V260706-2 013 with the laboratory's PDF, and an invented ID returned 404.
What a confirmation is worth in our scores
On a Vanguard Laboratory certificate, a printed key earns +1.5 and a key we confirm at the laboratory earns another +1.5 under our lab rule. Only confirmed certificates count toward the testing gate (rule A9). We have confirmed 59 of 76 certificates naming Vanguard Laboratory, from 5 vendors; the vendors are listed on the Vanguard Laboratory profile. For what every field on a certificate means, read how to read a peptide COA.
Verifying Vanguard Laboratory: Frequently Asked Questions
Can I verify a Vanguard Laboratory COA online?
Yes. Each certificate prints a report ID. Search the report ID at verifiedbyvanguard.com. A real ID returns the report with the laboratory's PDF.
What should an invented Vanguard Laboratory code return?
An invented ID returns 404 (not found). We ran this control when we checked the lookup on 2026-10-22.
How many Vanguard Laboratory certificates has Peptide Source Review confirmed?
59 of the 76 certificates naming Vanguard Laboratory on listed vendors' pages were confirmed against the laboratory's own record, from 5 vendors.
What tier is Vanguard Laboratory?
Vanguard Laboratory is tier B+ in our lab directory, graded on six published checks. Check L3 is whether its reports can be confirmed with the laboratory.