Where to buy TB-500 (Thymosin Beta-4 fragment) in the UK: the sellers with a verifiable COA

The newest verifiable TB-500 certificate on any UK seller's website is on Camo Chem (camochem.uk), analysed 11 Sep 2026 (task #229223 on Janoshik's site); 11 verified sellers hold one covering TB-500, listed newest first below.

A record of paperwork, not a recommendation: The Peptide Watch sells nothing, takes no money from sellers and links to none of them.

Who has the newest report · Why the date matters · What purity means · What TB-500 is · Regulators · Every report

Who holds the newest TB-500 report (11 verified UK sellers)

Newest report first. Every report was opened on Janoshik's own website and names the seller as the client. The date is the analysis date printed on the report. The verify link opens the laboratory, never the shop. Audit findings, not recommendations.

Why the date on a certificate matters

What a purity figure means

The purity on a Janoshik report is the share of the main peak in an HPLC chromatogram. 99.5% means that 99.5% of what the detector saw was one substance and 0.5% was something else. It is not the amount in the vial: that is the separate quantity line, in milligrams. It does not by itself prove which substance the peak is: that is identity, confirmed by mass spectrometry. And it says nothing about sterility, endotoxins or heavy metals, which are separate tests.

A purity figure printed on a shop page with no report behind it is a claim, not a measurement. Between two reports, the difference that matters is rarely 99.2% against 99.8%; it is whether the report exists at all, names the seller as the client, covers this compound on its own, and is recent.

What TB-500 is, and what it is sold as

TB-500 is a synthetic fragment of the naturally occurring protein Thymosin Beta-4, studied in research on cell migration and angiogenesis. Because it is usually sold alongside BPC-157, it inherits exactly the same certificate problems.

Most of the evidence is about a different molecule. Thymosin beta-4 is a 43-amino-acid protein your own cells make, and it has a large literature: 937 PubMed papers and 3 clinical trials, including a placebo-controlled intravenous safety study in healthy volunteers and a venous-ulcer trial, both from 2010. TB-500 is a short synthetic fragment of it. Only 31 papers name TB-500 at all, and most of those are reviews or doping-detection methods, not studies of the fragment itself.

The fragment's own evidence is thin and recent. The clearest study of TB-500 as sold is a 2026 rat Achilles-tendon experiment that combined it with BPC-157. There is no human trial of TB-500, so any claim that the full protein's results transfer to the fragment is an assumption, not a finding.

It is a banned substance in sport. WADA's 2026 Prohibited List names "Thymosin-β4 and its derivatives e.g. TB-500" under S2.3, growth factors and growth factor modulators, a class prohibited at all times, in and out of competition. Buyers who are tested athletes should know that before they read any certificate.

What regulators say about TB-500

In the UK. Not a licensed medicine in the UK. Prohibited in sport at all times under WADA S2.3.

WADA, The 2026 Prohibited List (International Standard), valid 1 January 2026, section S2.3 Growth factors and growth factor modulators, page 8. S2.3 lists "Thymosin-β4 and its derivatives e.g. TB-500" among growth factors prohibited at all times, in and out of competition. Source.

What the 13 TB-500 certificates show

We have read 13 Janoshik reports covering TB-500, published by 11 UK sellers. Each was opened on Janoshik's own website. All 13 name the seller itself as the client. 7 of the 13 are dated within the last six months and 1 is more than a year old. The newest is dated 11 Sep 2026 and the oldest 28 Jan 2025.

All 13 reports give a purity figure for TB-500. The figures run from 96.593% to 99.945%, and 10 of the 13 are at 99% or above. A purity figure describes the sample the laboratory received, not every vial from that batch.

Read directly from the newest reports: Camo Chem: task #229223, analysed 11 Sep 2026, 5.27 mg recovered at 96.593%, client Camo Chem UK; Imperialpeptides: task #214255, analysed 6 Aug 2026, 5.48 mg recovered at 98.750%, client Imperial Peptides UK; Lab77Peptides: task #208428, analysed 6 Aug 2026, 10.96 mg recovered at 99.020%, client Lab77peptides.co.uk.

A certificate is a batch document. The lines that matter are the compound (it must say TB-500, not only a batch code), the client (the shop, not its supplier) and the analysis date. A new batch is untested until a new report appears.

TB-500 in the UK at a glance

Counted from the vendor ledger at build time. The A-Z directory lists every seller and what each publishes instead.

Questions people ask

The Peptide Watch's position on TB-500

Not a licensed medicine in the UK. Prohibited in sport at all times under WADA S2.3. The Peptide Watch reads the certificates UK sellers publish and does not recommend anywhere to buy TB-500. Sellers on this page are listed by the date of their newest TB-500 certificate and by nothing else. If you can verify a seller's testing, you can at least judge its evidence; if you cannot, you are taking the seller's word for what is in the vial. See how UK testing compares across every seller in the market statistics.

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