How to check a peptide seller before you pay
Two separate audits: the company that takes your money, and the chemistry in the vial. Each catches what the other cannot, and anyone who runs only one is guessing.
Step 1 · one minute
Audit the company — that is what this site does
Type the seller's name or web address into our checker. We match every seller against official registers — Companies House, the GPhC and CQC in the UK, FDA and state records in the US — and show any published regulator action with the document one tap away. The score says how much of the route matched: 100% means who they are, whether they may sell it, and the way it reaches you all matched official records; a warning outranks everything else.
This half catches shell storefronts, lookalike domains, sellers a regulator has already written to, and sites with no accountable business behind them. It also tells you what recourse your money has — the honest version is here. What it cannot do is see inside a vial: a real, registered company can still ship a bad batch.
Step 2 · before and after paying
Verify the lab report — on the laboratory's own website
We do not test chemicals, so this half happens off this site. Four checks, in order; a seller that fails any of them has failed the audit:
- The batch-specific report is visible before you pay. On the product page, for the exact batch on sale. “Certificate available on request” is a warning sign, not a service.
- It shows both purity and identity. HPLC purity and mass-spectrometry identity together. A purity percentage without identity testing means nobody has shown what compound the powder actually is.
- The testing laboratory is named, and the report verifies on the lab's own site. Never rely on the seller's PDF — images are easy to edit. Reports from Janoshik Analytical, the laboratory most of this market uses, carry a task number and key you can enter on the lab's verification page; its public database also lists openly published tests. Whatever the lab, the rule is the same: the document must check out at the source, and a report from a lab you cannot find is not evidence.
- The batch number on the vial matches the report — checked the day it arrives. A verified report for a different batch than the one in your hand proves nothing about your order.
What a lab certificate actually proves
A certificate of analysis describes one batch at one moment: what the powder is (mass spectrometry) and how pure it is (HPLC). It does not make the product legal to take, does not prove the vial you receive belongs to the batch tested, and says nothing about sterility unless a sterility test is on it. If you rely on one anyway: check the batch number on the vial against the document, and verify the document on the testing laboratory's own website — never only on the seller's.
Standard purity testing also says nothing about sterility, endotoxins or heavy metals unless those tests appear on the report — and no report makes an unapproved product legal to take. For what a product's legal position actually is, look it up by name.
Red flags that end the check early
- Selling only through direct messages — Telegram, WhatsApp, DMs — with no website or business identity.
- Payment only by cryptocurrency, bank transfer or peer-to-peer apps: no chargeback, no recourse.
- No laboratory named anywhere on the paperwork, or a named lab that cannot be found.
- A current regulator warning on the seller — we show these with the document linked. Do not pay while one stands.
PepCred is independent, takes no money from sellers or laboratories, and links every claim to its source. What we check and how is on the methodology page; what our scores can and cannot tell you is on the disclaimer page.