Is Tested Peptides legit? An independent review
Tested Peptides publishes its own Janoshik certificate of analysis, naming Tested Peptides as the client, with its most recent certificate dated Jan 2026. Because Janoshik reports carry a unique code checkable on janoshik.com, the result can be independently verified. Its latest verified certificate (Jan 2026) is the oldest in this index, which is why it ranks last among the verified vendors: genuine, but older.
Verified facts at a glance
| Fact | What we found | How it was checked |
|---|---|---|
| Standard applied | own-name verifiable-COA standard | how every vendor is judged, methodology |
| Certificate | ✅ genuine Janoshik, own name | read on the seller's own site |
| Latest certificate date | Jan 2026 | as printed on the report |
| This audit as data | /data/vendor/testedpeptides-co-uk.json | same record the open dataset serves, re-checked daily |
The certificate
1 reports we opened on Janoshik's site
Each row was opened by a real page load on verify.janoshik.com and transcribed. The client column is the name the laboratory printed. Newest first. Audit findings, not recommendations.
| Task | Sample | Test | Client on the report | Received | Result | |
|---|---|---|---|---|---|---|
| #97473 | TB500 5 mg | purity | [email protected] | 6 Jan 2026 | TB-500 (TB4) · 4.86 mg · 99.393% | verify |
Show buyers you are independently verified
Tested Peptides is one of only 38 UK vendors whose testing The Peptide Watch could independently verify. If that is you, display this badge: it links back to this audit. No fee and no catch, verified vendors are welcome to use it. It keeps itself up to date: it shows as verified only while this listing is verified.
<a href="https://thepeptidewatch.com/vendor/testedpeptides-co-uk" target="_blank" rel="noopener"><img src="https://thepeptidewatch.com/badge/testedpeptides-co-uk.svg" alt="Verified by The Peptide Watch" width="272" height="48" style="border:0"></a>
Reviews
Read it critically. A Trustpilot score measures whether parcels turn up and support replies, not whether the vial contains what the label says. A vendor can have hundreds of happy delivery reviews and still show you a borrowed or fake certificate; the two are unrelated. Also watch for a burst of near-identical 5-star reviews in a short window, the signature of bought reviews.
Read Tested Peptides on Trustpilot →
Is Tested Peptides legit? The questions people ask
Is Tested Peptides legit?
On The Peptide Watch's independent audit, Tested Peptides (testedpeptides.co.uk) publishes its own verifiable Janoshik certificate of analysis that names Tested Peptides itself as the client, so its testing can be checked on Janoshik's own website. That is the strongest evidence standard we track. It confirms the credibility of the seller's evidence, not any individual vial you receive.
Can I trust Tested Peptides, and is it a good supplier?
Its lab evidence is independently verifiable, which is the best signal a paper trail can give. Its Trustpilot score is 4.1 from 9 reviews, which reflects delivery and service, not whether a vial contains what the label says. Even a genuine certificate proves a sample was tested once, not that your specific batch matches it, so weigh it alongside consistent results over time.
Is Tested Peptides a scam?
Nothing in this audit indicates that. Tested Peptides shows a verifiable own-name Janoshik certificate, the opposite of the borrowed or self-made certificates the watch list flags. Judge it on that checkable evidence rather than the word 'scam'.
Does Tested Peptides publish a real Certificate of Analysis?
Yes. Its most recent own-name Janoshik certificate is dated Jan 2026 and can be verified on Janoshik's website by its unique code, so the purity result cannot be faked or edited.
Related vendors
The Peptide Watch. "Is Tested Peptides legit? Independent review & COA audit." Verified 1 October 2026. https://thepeptidewatch.com/vendor/testedpeptides-co-uk