Sixteen labs sign most of the certificates you'll find on research peptide sites, and Freedom Diagnostics Testing, Janoshik and Vanguard Laboratory appear most often. Almost none publish an ISO/IEC 17025 accreditation that clearly covers peptide purity testing. Most do run a public lookup, which is the single most useful check: if the lab's own copy of a report doesn't match the vendor's PDF, stop there.
Notice: Research peptides are sold for in-vitro laboratory research only. They are not FDA-approved, not for human or animal consumption, and this page is not medical advice. It contains no dosing or use guidance.
We don't test products ourselves. Each lab below has its own profile with sources; figures are as published on the labs' sites on October 21, 2026.
The labs at a glance
"Vendors citing" counts the 144 vendors in our directory whose COA pages name the lab.
| Lab | Location | Accreditation shown | Report lookup | Basic panel (published) | Vendors citing |
|---|---|---|---|---|---|
| Freedom Diagnostics Testing | Franklin, TN | None found (says ISO 9001 compliant) | Yes, search code | $200 purity + ID | 28 |
| Janoshik Analytical | Not published | None found | Yes, task number + key | $215 (BPC-157) | 16 |
| Vanguard Laboratory | Olympia, WA | A2LA 6377.01 (scope didn't list peptide HPLC) | Yes | $250 | 13 |
| ILS Laboratories | San Diego, CA | Not confirmed | Yes, access code | $200 | 10 |
| Kovera Labs | Buffalo Grove, IL | None found | Yes, COA ID | $200 | 9 |
| MZ Biolabs | Tucson, AZ | None found | No public lookup | Not published | 7 |
| Ethos Analytics | Phoenix, AZ | Claimed, not confirmed | Yes, sample ID | Not published | 6 |
| BioRegen | Not published | None found | Yes, number + key | $165 | 5 |
| Bioviridian | College Station, TX | "In progress" | Yes, COA number | $150 | 4 |
| Accumark Labs | Anaheim, CA | "Pending" | Yes, verification code | $250 | 4 |
| Horizon Analytical | Not published | None found | Yes, report number | $200 | 3 |
| TrustPointe Analytics | Dorr, MI | None found | Yes, LIMS key | Not published | 2 |
| Chromate | Hudson, NH | None found | Yes, Verify portal | $180 to $420 by compound | 2 |
| Krause Analytical | Austin, TX | None found | Yes, request form | Not on own site | 1 |
| Harrens Lab | Hayward, CA | A2LA 4074.02 (renewal not confirmed) | No public lookup | Not on own site | 1 |
| BT Labs | West Palm Beach, FL | None found | No public lookup | Not published | 1 |
A few other names appear once or twice in our data (Colmaric, Eagle Analytical, Verum, MDx and others). We haven't profiled them yet.
What accreditation means here
ISO/IEC 17025 is the standard for testing-lab competence. An accreditation body such as A2LA, ANAB or PJLA audits the lab against it and issues a certificate with a scope: the specific tests the lab is accredited to run. Two points matter for peptide COAs:
- A certificate isn't blanket approval. Vanguard's A2LA scope that we read covered microbiology, trace elements, preservatives and residual solvents, not peptide HPLC purity. Harrens' certificate appears on California's hemp-lab list.
- "Compliant", "in progress" and "pending" aren't accreditation. Freedom Diagnostics says it's ISO 9001 compliant, a general quality-management standard. Bioviridian and Accumark list 17025 as in progress or pending.
Unaccredited doesn't mean wrong. It means you're relying on the lab's word, so the cross-checks below matter more. More background: HPLC purity explained and purity vs net content.
How to verify any peptide COA
- Find the lab's own record. Use the lookup linked in each profile with the code printed on the report. Compare every number, the date and the client name with the vendor's PDF.
- Match the lot. The lot or batch on the certificate should match the vial label. A report for a different lot tells you about a different batch.
- Check what was tested. Most basic panels cover purity and identity, sometimes quantity. Endotoxin and sterility are add-ons; see endotoxin testing.
- Note who the client is. Janoshik and Kovera sell extra copies of a report under a different client name, so one test can appear under several vendors. Finnrick-commissioned reports from Krause, Harrens and BT Labs name Finnrick as the client.
- Read the method. Identity by mass spectrometry is stronger than HPLC retention-time matching alone, which ILS and Ethos use on standard panels.
Use our COA checklist and how to read a peptide COA. For Janoshik specifically, see how to verify a Janoshik report.
Vendor-commissioned vs independent testing
Every certificate on a vendor's site was ordered by that vendor, which picks the sample. Independent programs buy products anonymously instead. Finnrick sends samples to Krause Analytical, Harrens Lab, BT Labs, Chromate and others, and publishes results whether they pass or fail. Our vendor testing tracker shows which vendors have that independent data, and Janoshik vs Finnrick explains the difference.
Bottom line
Pick vendors whose COAs name one of these labs, carry a lot number that matches your vial and can be pulled up on the lab's own lookup. Freedom Diagnostics, Janoshik, Vanguard, ILS and Kovera all support that check. MZ Biolabs, Harrens and BT Labs don't run a public lookup, so their reports take an email to confirm. For vendors that meet these standards, see third-party tested peptides and Janoshik-tested peptide vendors.