How to verify a Janoshik 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
- 159
Certificates confirmed
- Vendors confirmed
- 15
Vendors confirmed
Four steps
Find the code on the certificate
Each report prints a report number and a verification key, which together form the report's address.
Open the laboratory's own lookup
Enter the key at the laboratory's verification page, or open the verify.janoshik.com address printed on the report. 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 key opens the report on verify.janoshik.com, the laboratory's own subdomain, with the same sample details as the vendor's copy. 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 key returns an empty page with no report. Change one character of a real code and look it up again: a lookup that answers every code proves nothing.
janoshik.com/verify → (opens in new tab)
Our check (L3, pass): On 2026-10-22 verify.janoshik.com returned report 85982 for its real key and an empty page for an invented key.
What a confirmation is worth in our scores
On a Janoshik 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 159 of 159 certificates naming Janoshik Analytical, from 15 vendors; the vendors are listed on the Janoshik Analytical profile. For what every field on a certificate means, read how to read a peptide COA.
Verifying Janoshik Analytical: Frequently Asked Questions
Can I verify a Janoshik Analytical COA online?
Yes. Each report prints a report number and a verification key, which together form the report's address. Enter the key at the laboratory's verification page, or open the verify.janoshik.com address printed on the report. A real key opens the report on verify.janoshik.com, the laboratory's own subdomain, with the same sample details as the vendor's copy.
What should an invented Janoshik Analytical code return?
An invented key returns an empty page with no report. We ran this control when we checked the lookup on 2026-10-22.
How many Janoshik Analytical certificates has Peptide Source Review confirmed?
159 of the 159 certificates naming Janoshik Analytical on listed vendors' pages were confirmed against the laboratory's own record, from 15 vendors.
What tier is Janoshik Analytical?
Janoshik Analytical is tier B+ in our lab directory, graded on six published checks. Check L3 is whether its reports can be confirmed with the laboratory.