Peptide Vendor Testing Tracker

By the PeptideChecked research team · Updated September 26, 2026

Every vendor we list, side by side on the testing evidence you can check yourself: which lab tests their products, whether you can verify a report with that lab, how they publish certificates, and what independent testing shows. Last checked September 26, 2026.

Peptide vendor testing evidence, checked September 26, 2026
VendorScoreLab on certificatesWhere the lab is namedVerify with the labLot-level COAsFinnrick (independent)
Peptide Plugs7.5Freedom DiagnosticsSite and each COA entryAccession code on the lab's own search117 dated COAs; lot on product pagesProfile, 0 tests
NextGenPeps8.8Janoshik, BioRegenEach COA library entryJanoshik task number and key (Janoshik reports)Dated entries; lot not shown in libraryNo profile
Licensed Peptides7.4Vanguard Laboratory, Ethos AnalyticsPurity and endotoxin report pagesVanguard verification link (not tested by us)Report index by lot; some lot numbers appear on more than one productNo profile
Alpha Pro Peptides6.3Freedom Diagnostics; Horizon Analytical on one MOTS-c lotOn COA PDFsCertificates matched to lab-hosted copies by an independent reviewerLot ID, date, purity and net contentNo profile
American Peptides9.1BioviridianHomepage only, not on COA pagesBioviridian search126 lot-matched PDFs with lot lookupProfile, 0 tests
Ascension Peptides8.1Kovera Labs, MZ BiolabsProduct pages, per batch (new as of September 2026)None documented by the vendor85 records, searchable by lotProfile, 0 tests
PSPeptides8.5North American DiagnosticsOn COA PDFs onlyLab batch lookup; no accreditation listedDated by month; batch on PDFProfile, 0 tests (listed as ProSupply PS Peptides)
Swiss Chems6.5Janoshik (per FAQ)FAQ only, not on the results pageJanoshik lookup, if the report is Janoshik'sBatch codes in report files48% rating; 4 of 10 tests passed (Apr 2025 to Apr 2026)

How to read the tracker

Rows are ordered by the strength of testing evidence, not by our editors' ranking (see how we rank). The score column is each vendor's PeptideChecked transparency score.

  • Lab on certificates: the laboratory named on the vendor's COAs or product pages.
  • Verify with the lab: whether you can confirm a report with the issuing lab, which is what makes a certificate hard to fake.
  • Lot-level COAs: whether certificates are tied to the lot on your vial.
  • Finnrick: independent results from samples bought and tested without the vendor's involvement. See what is Finnrick.

What stands out this month

Peptide Plugs remains the easiest to check, with accession codes you can look up on Freedom Diagnostics' own search. Ascension Peptides now names Kovera Labs and MZ Biolabs per batch on its product pages, which it did not do when we first reviewed it. Swiss Chems is still the only listed vendor with Finnrick results, and they are weak: a 48% rating with 4 of 10 tests passing between April 2025 and April 2026.

For the reasoning behind each row, read the third-party tested peptides breakdown, and use the COA checklist on any certificate you receive.

Cite this data

You are welcome to cite or link this tracker. Please credit "PeptideChecked vendor testing tracker" with a link to this page and the date checked.

Frequently asked questions

How often is the tracker updated?

We re-check every vendor's COA pages and Finnrick profile monthly and update the date at the top of the page.

Why do most vendors show 0 Finnrick tests?

Finnrick results depend on samples bought and submitted for testing. Newer or smaller vendors often have a profile but no tests yet, which means no independent data rather than bad data.

Does a named lab mean the product is good?

No. A named lab makes a certificate traceable, which is the first step. You still need to match the lot, verify the report with the lab and look for independent results.

More free tools

Choosing a supplier? See the best peptide vendors in the USA.

Research use only. The compounds referenced on this page are sold for laboratory research purposes only. They are not drugs, foods, cosmetics or dietary supplements, and they are not approved by the FDA for human or veterinary use. Nothing on this page is medical advice. PeptideChecked does not sell peptides, does not provide dosing guidance, and does not recommend the use of any compound in humans.