🔍 PeptideVerify
Last updated: March 2026
Don't trust random vendors with your health. This is the free checklist we use to vet a peptide source before recommending it.
See How We Vet →How We Vet a Vendor
Check the COA
Does the vendor publish a recent third-party HPLC/MS certificate of analysis tied to the actual batch — not a generic stock image?
Research reputation
Reviews, community reports, complaint history, and how long the vendor has operated under the same name.
Scan for red flags
Implausible purity claims, no COAs, off-platform-only payments, medical claims, or pressure tactics.
The Free Vendor-Vetting Checklist
Run any peptide source through these before you buy. If a vendor fails several, walk away.
- Batch-specific COA: a recent third-party HPLC (and ideally MS) certificate that names the exact product and lot.
- Identity & purity match: the COA's compound and purity (typically ≥98%) actually match what's advertised.
- Independent lab: testing done by a named third-party lab, not the vendor's own unverifiable "in-house" claim.
- Track record: consistent reputation across reviews and community reports over time, under the same business name.
- Transparent contact & policies: real support channel, refund/repour policy, clear shipping and storage handling.
- No medical claims: legitimate research vendors sell "for research use only" and don't promise to treat disease.
- Sane pricing & payment: prices that aren't implausibly cheap, and standard payment methods (extreme crypto-only/“friends & family” pressure is a flag).
Get It Tested by an Independent Lab
You can't verify peptide purity at home — real purity (HPLC) and identity (mass spec) require a lab. If you want certainty on a batch, send a sample to one of these independent testers. We earn nothing from these links; they're the labs the research community actually trusts.
🇨🇿 Janoshik Analytical
The de-facto standard for independent peptide HPLC purity + MS identity testing. Roughly €50–80/sample. Public, searchable COA database.
Visit Janoshik →🇺🇸 Peptide Test
US-based HPLC + identity testing (US shipping, no customs). Per-vial pricing varies by compound. A domestic alternative to Janoshik.
Visit Peptide Test →Tools for Verifying & Handling Peptides
As an Amazon Associate we may earn from qualifying purchases. These are the inexpensive tools that make at-home verification and proper handling possible — they don't replace lab testing.
High-Precision Milligram Scale (0.001g)
Weigh the lyophilized powder to confirm you actually received the labeled mg amount before reconstituting.
Check price on Amazon →JamBer Digital Milligram Pocket Scale 50g x 0.001g
Compact 0.001g-resolution scale with calibration weights — a cheap reality check on vendor-stated quantities.
Check price on Amazon →Sterile Syringe Filters, PTFE 0.22µm
A quick particulate/clarity check on a reconstituted solution — cloudiness or debris is a red flag.
Check price on Amazon →Sterile Alcohol Prep Pads, 70% IPA (200ct)
Wipe vial stoppers before every draw — basic sterile technique that protects an expensive vial.
Check price on Amazon →Fridge/Freezer-Safe Peptide Vial Case
Peptides degrade with heat and light. Organized cold storage keeps a verified batch verified.
Check price on Amazon →Skip the guesswork — buy from a tested source
Swiss Chems publishes batch COAs on its catalog. Starting with a vendor that tests is the easiest verification step.
Shop Swiss Chems →Want a specific vendor checked?
This research is free. Send us the vendor, product, and any batch/COA links and we'll fold our findings into our vendor research. We also publish reputable, COA-backed sources we already trust.
Contact Us → See Vetted Vendors →