What the labs behind your peptide COA are actually accredited to test

What happened

A certificate of analysis on a peptide vial almost always names a lab, and most of those labs carry some version of an ISO/IEC 17025 accreditation claim, the standard meant to show an outside auditor checked their work. We hear one question a lot: are these labs actually accredited to test peptides, or just accredited, full stop? So we checked, lab by lab, against each accrediting body's own public register, A2LA, PJLA, ANAB and IAS, and against the lab's own published scope document where one exists. A vendor's COA and a review site's badge don't count as evidence here. A register listing or a scope PDF does.

We checked all 16 labs that show up across the vendors we track, ordered by how often you'd run into the name: Freedom Diagnostics, Kovera Labs, Janoshik, ILS Laboratories, Chromate, Vanguard Laboratory, MZ Biolabs, Bioviridian, Ethos Analytics, Analytical Formulations, Horizon Analytical, Accumark Labs, Optiq Health Labs, TrustPointe Analytics, Krause Analytical and SR Biolabs. This isn't a scorecard. Fourteen of the sixteen make no accreditation claim we could confirm either way, a different thing from being unaccredited. Two, Vanguard Laboratory and Ethos Analytics, hold real accreditations we read directly off the accrediting body's own paperwork, and neither one's scope covers peptide purity.

What an accreditation certificate actually promises you

That cuts both ways. A lab can be accredited for an unrelated method and still run a genuinely good mass spec on your peptide, because accreditation and competence are related but not the same thing. And a lab can be accredited for exactly the right method and still hand back a clean certificate on a vial the vendor hand-picked before mailing it in, because accreditation checks the method, not which vial reached the lab's door. Neither direction means the certificate is meaningless, only that it answers a narrower question than most people assume.

The 16 labs, and what we could actually confirm

"Not found" isn't the same as "not accredited." It means we searched the PJLA, ANAB and IAS directories, and for Janoshik the Czech Accreditation Institute's database, and couldn't confirm a claim exists. For Janoshik we don't have the registered legal name, so that search tells us little on its own. Any lab can change its row by sending us a certificate number we can check.

Vanguard Laboratory and Ethos Analytics are the two where we could finish the check, and both came back the same way. Vanguard holds a genuine A2LA accreditation, certificate 6377.01, scoped to food safety microbiology, trace metals and residual solvents. Peptide purity isn't on it. Ethos Analytics holds a genuine PJLA accreditation, certificate L26-225, and its six-page scope supplement covers microbial testing, heavy metals, and HPLC testing for things like vitamin C, caffeine and cannabinoid potency. The word peptide doesn't appear anywhere in it. Both labs are accredited. Neither is accredited for what its presence on a peptide COA implies.

What this means for you right now

A certificate of analysis is still worth checking, and most of what makes one trustworthy has nothing to do with accreditation. Here's what to look for:

• A lot number you can match to the vial in your hand.
• A test date, so you know the result is recent.
• A named method, such as HPLC (a purity test) or LC-MS (an identity test), behind the purity result.
• A certificate number for any accreditation claim, one you can look up on the accrediting body's own site.
• A scope that names the actual test, not a broad category like "chemical testing."

A badge with no number behind it is a marketing choice, not evidence, whether or not the lab behind it is a good one. None of this means walk away from every vendor whose lab we couldn't confirm. Accreditation answers a narrower question than most people think: not "is this peptide pure," but "did an auditor confirm this lab runs its stated methods correctly." Our price comparison tool and vendor directory track pricing and documentation across the vendors we monitor, and we'll keep updating which labs we can confirm as we learn more.

What to watch next

The labs we couldn't confirm are mostly a matter of missing paperwork, the kind of gap a direct written request can close. If Freedom Diagnostics, Kovera or any other unconfirmed lab supplies a certificate number, we'll check it the way we checked Vanguard and Ethos, and say plainly whichever way it comes back.