Pour a coffee. Check the lab report.

Look up a peptide COA by lot number

849 certificates of analysis from Paramount Peptides and Peptira, searchable by the lot number printed on the vial. Every lot page shows the lab's results and a button that opens the lab's own verification record, so you can check it yourself.

849lot pages

335matched to the lab's own record by our checker

3testing labs (Accumark Labs, Freedom Diagnostics, Janoshik)

2vendors, every lot listed

Lab-record matching is automated where the lab offers a machine-readable record (Accumark Labs, Freedom Diagnostics). Janoshik records have to be opened by hand, so those pages say "not yet checked".

How it works

1. Find your lotThe lot or batch number is printed on the vial label. Type it in the box above.

2. Read the resultsEach lot page lists the lab, test date, HPLC purity, identity result and method, and shows the original COA.

3. Verify at the labOpen the lab's own record with one click and confirm the lot, date and numbers match. Don't take our word for it.

Recently tested lots (matched to the lab record)

See every lot in the COA lookup →

The vendors behind these COAs

Affiliate disclosure: the shop links below are affiliate links, and SKYLER is Skyler Humphrey's affiliate code. We earn a commission if you buy through the vendor links on this page, at no extra cost to you. Peptides & Coffee is an independent COA reference and is not owned by or affiliated with the vendors or labs listed. Lab results are published by the vendors and labs; we link to each lab's own verification record so you can check them yourself.

Paramount Peptides

541 tested lots on file · labs on its COAs: Accumark Labs, Janoshik

Shop Paramount Peptides ↗

Code SKYLER = 10% off at Paramount Peptides

Paid link: we earn a commission on purchases through this link or code, at no extra cost to you. See all Paramount Peptides lots.

Peptira

308 tested lots on file · labs on its COAs: Freedom Diagnostics, Janoshik

Shop Peptira ↗

Code SKYLER = 10% off at Peptira

Paid link: we earn a commission on purchases through this link or code, at no extra cost to you. See all Peptira lots.

Code SKYLER10% off at Paramount Peptides and Peptira

Offer as of Oct 7, 2026. SKYLER is Skyler Humphrey's affiliate code: we earn a commission on orders that use it, at no extra cost to you. Code details

More: our tested suppliers · where to get lab-tested lots, by compound.

We list every lot we can find for both vendors, including lots below 98% purity and lots we couldn't verify. We don't rank vendors, and listing a vendor isn't a recommendation for any use.

New tested lots, once a week

A short Thursday email: compound, lot, lab, test date, purity and a link to the lab's record. Plus a free one-page COA checklist.

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Guides

How to read a peptide COAHPLC purity, mass spec identity, lot numbers, lab accreditation and the red flags of a fake COA. BPC-157 vs TB-500Structure, what "TB-500" actually refers to, research status by study type, regulatory status, and every tested lot on file.