How to verify a Horizon Analytical 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
- 90
Certificates confirmed
- Vendors confirmed
- 6
Vendors confirmed
Four steps
Find the code on the certificate
Each certificate prints a report number.
Open the laboratory's own lookup
Search the number on the laboratory's verify page. 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 number returns the report record. 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 number returns no record. Change one character of a real code and look it up again: a lookup that answers every code proves nothing.
horizonanalytical.com/verify-coa → (opens in new tab)
Our check (L3, pass): On 2026-10-22 the lab's lookup returned report 1000060 and no record for an invented number.
What a confirmation is worth in our scores
On a Horizon Analytical 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 90 of 91 certificates naming Horizon Analytical, from 6 vendors; the vendors are listed on the Horizon Analytical profile. For what every field on a certificate means, read how to read a peptide COA.
Verifying Horizon Analytical: Frequently Asked Questions
Can I verify a Horizon Analytical COA online?
Yes. Each certificate prints a report number. Search the number on the laboratory's verify page. A real number returns the report record.
What should an invented Horizon Analytical code return?
An invented number returns no record. We ran this control when we checked the lookup on 2026-10-22.
How many Horizon Analytical certificates has Peptide Source Review confirmed?
90 of the 91 certificates naming Horizon Analytical on listed vendors' pages were confirmed against the laboratory's own record, from 6 vendors.
What tier is Horizon Analytical?
Horizon Analytical is tier A- in our lab directory, graded on six published checks. Check L3 is whether its reports can be confirmed with the laboratory.