Verification tool
Peptide COA Checker
This tool helps you check whether a peptide vendor's Certificate of Analysis is genuine. Pick the lab named on your report and we link you straight to that lab's own verification tool, plus the exact fields to match. We don't hold a database of certificates ourselves, we point you at the labs that do.
Check your certificate against the issuing lab
Find the lab name printed on your COA, select it below, and follow the link to that lab's own public record.
Enter the task number and unique key printed on the certificate into Janoshik's own verification page. A match pulls the original record straight from their server, not a copy anyone else hosts.
The most frequently named lab on peptide-vendor COAs in this market, with the longest public track record of the labs on this list.
Open Janoshik Analytical's verification page →Opens janoshik.com in a new tab. We don't process or store anything from that page, we're linking you to the lab's own tool.
Match these fields exactly
- Task number + unique key
- Compound name
- Purity percentage
- Sample-received / test date
If any field on the lab's own record doesn't match what's printed on your certificate, or the lookup returns nothing at all, treat the certificate as unverified.
Match the report to your vial
A verified lookup only tells you the report is genuine. It still needs to match the specific product in front of you.
Product name matches, exactly
The compound or blend name on the certificate reads the same as the vial label, including any salt form or blend name. A generic name on the COA covering a specific branded blend is a mismatch, not a formality.
Strength and mass line up
A 10mg vial should have a report showing results consistent with a 10mg fill, not a 5mg or 15mg batch. Vendors occasionally reuse a report from a different strength of the same compound.
Batch or lot number matches, character for character
The batch/lot printed on the vial or box should match the batch/lot on the certificate exactly. A close-but-not-exact match (one digit off) is worth treating as a non-match.
Test date is possible
The lab's test date should fall on or after the batch was actually produced. A report dated before the vendor says the batch existed cannot be describing that batch.
The lab is real and named
Check the lab name against the directory below (or search for it independently). A COA naming a lab with no working website, or no lab name at all, doesn't verify anything.
Identity and purity are both present
A complete report shows both a purity result and an identity confirmation (typically mass spectrometry). A purity number alone, with no identity test, is answering only part of the question.
Red flags worth slowing down for
None of these prove a COA is fake on their own. Together, or paired with a failed lookup, they're reason to ask the vendor direct questions before you buy.
- FlagThe same task, job, or accession number appears on certificates for two different vendors, or two different compounds entirely.
- FlagA purity claim with no chromatogram, no report number, and no way to look it up anywhere, just a percentage on a product page.
- FlagA certificate header, logo, or letterhead that looks edited: mismatched fonts, a blurry rescan, or a lab logo that doesn't match that lab's actual branding.
- FlagA lab name that doesn't resolve to a working website, or a website that describes no actual testing capability beyond a logo and a contact form.
- FlagA test date that predates the vendor's own stated manufacture or fill date for that batch, or a date set in the future.
- FlagThe exact same COA file or image reused across multiple, unrelated product listings on a vendor's site.
- FlagA verification link that resolves to a domain that only looks like the lab's real domain: check the spelling character by character before entering anything.
Lab directory
Every lab below was independently confirmed to have a live, working website before being listed. This is a directory of real analytical labs commonly named on peptide COAs, not an endorsement of any single one and not a claim that we work with or are affiliated with any of them.
| Lab | Location | Verification method | Portal |
|---|---|---|---|
| Janoshik Analytical | Prague, Czech Republic | Enter the task number and unique key printed on the certificate into Janoshik's own verification page. | Verify a report → |
| Freedom Diagnostics Testing | Franklin, Tennessee, US | Search their public certificate database by the accession number printed on the report or by the submitting vendor's name. | Verify a report → |
| ILS Laboratories | San Diego, California, US | Every certificate ILS issues carries a QR code. | Verify a report → |
| Chromate | Hudson, New Hampshire, US | Enter the job number and access code from the certificate on Chromate's own verify page to pull the matching report. | Verify a report → |
| Kovera Labs | Buffalo Grove, Illinois, US | Scan the QR code on the certificate, or open Kovera's verification page directly, to confirm the report against their record. | Verify a report → |
| Purity Analytics | Platform hosting reports from named performing labs (not a single physical lab) | Not a testing lab itself, it's a digital certificate platform. | Verify a report → |
| MDx BioAnalytical Laboratory | College Station, Texas, US | Enter the certificate identifier (printed as "COA######") into MDx's public certificate search to confirm it against their record. | Verify a report → |
| Vanguard Laboratory | Olympia, Washington, US | Products enrolled in the "Verified by Vanguard" program carry a dynamic QR code linking to the hosted report on Vanguard's own reporting hub, built specifically so a static PDF copy can't be forged. | Verify a report → |
| MZ Biolabs | Tucson, Arizona, US | No self-serve public lookup exists. | Verify a report → |
Frequently asked questions
Does this tool verify my COA for me?+
No. This page links you to the issuing lab's own public verification tool and tells you what to check once you're there. We don't fetch, store, or hold a copy of anyone's certificate, and we never tell you a report is genuine ourselves. The lab's own record is the only source that can do that.
The lab named on my COA isn't in your directory. What now?+
We only list labs whose website we could independently confirm is live and real. If a lab isn't listed, search for its official site yourself and look for a verification, portal, or COA-lookup page, or contact the lab directly using contact details from their own site, not from the vendor's product page.
The lookup doesn't find my report, or the fields don't match. What does that mean?+
Treat the certificate as unverified. That doesn't automatically mean it's fabricated, a lab's public database can occasionally lag a very recent test, but you should not treat an unverifiable report as equivalent to a confirmed one. Contact the vendor and ask them to explain the mismatch before buying.
Can a vendor fake the verification link itself?+
Yes, that's why this tool sends you to each lab's own domain rather than an embedded frame. Type the lab's domain yourself or use the link on this page, and check the address bar matches the real domain before entering any code. Lookalike domains that swap or add a character are a known trick in this market.
If the COA checks out, does that mean the vendor is trustworthy overall?+
It means that specific batch's identity and purity results, as reported by that lab, match what's printed on the certificate. It says nothing about the vendor's shipping practices, business longevity, or customer service. See our methodology page for how we weigh a vendor's full picture, COA practices included.
Research-use context
This page is a research aid for checking publicly available lab documentation against its source. It is not medical advice, and a matching certificate does not indicate that any product is safe, legal to possess, or fit for any particular use. Products discussed across this site are described by vendors as research-use materials, not for human consumption. See our terms of use and affiliate disclosure for the full picture.
Related: how to read a peptide COA · our scoring methodology · full vendor rankings