TB-500 UK 2026: Complete Research Reference | Peptides Lab UK
Important regulatory notice. TB-500 is not licensed by the MHRA for human or veterinary use in the United Kingdom. It is supplied to the laboratory market as a research-use-only reference compound and appears on the WADA Prohibited List in sport. This page is a literature-context overview and trust-signal sourcing reference. It is not personal-use guidance and Peptides Lab UK does not endorse any human or veterinary use of TB-500.
Quick reference summary. TB-500 is a synthetic peptide containing an active fragment from thymosin beta-4 (TB4), a naturally occurring protein implicated in cellular migration, actin biology and angiogenesis in the published cell-biology literature. The published TB-500 research is dominated by in-vitro and small-animal model work. TB-500 is on the WADA Prohibited List and is not licensed in any major jurisdiction. Peptides Lab UK supplies TB-500 as a research-use-only laboratory reference compound with batch-specific HPLC certificates of analysis.
UK regulatory and sport-testing position (2026)
TB-500 has no UK marketing authorisation. The MHRA opened investigations in April 2026 into UK clinics making therapeutic claims about unregulated peptide products. TB-500 is also banned in WADA-accredited anti-doping testing under the peptide hormones, growth factors, related substances and mimetics class. WADA-accredited laboratories run targeted assays for TB-500. Anyone competing under WADA, UK Anti-Doping (UKAD), professional federation rules or military testing should treat TB-500 as a detectable banned substance.
What the molecule actually is
TB-500 is a synthetic peptide that contains an active sequence from thymosin beta-4. Thymosin beta-4 is a naturally occurring 43-amino-acid protein found in most mammalian cells. The published cell-biology literature describes TB4 in the context of cellular migration, actin polymerisation regulation, and angiogenesis-related gene expression.
What the published research record covers
The peer-reviewed TB-500 and TB4 literature is dominated by in-vitro cell-culture studies of cellular migration, actin biology and signal transduction, plus rodent-model studies of soft-tissue repair (tendon, ligament) and cardiac models of myocardial injury. Large blinded placebo-controlled human clinical trials of TB-500 are not available, and TB-500 has not been advanced through the regulated drug-development pathway by any pharmaceutical sponsor.
Quality requirements for a research-grade reference sample
For laboratory researchers, identity and purity are the only metrics that matter. A responsible supplier publishes:
Batch-specific certificate of analysis (COA), downloadable per batch
Third-party HPLC purity data with chromatogram
Mass-spectrometry identity confirmation against the TB-500 reference standard
Clear research-use-only labelling, with no human or veterinary use claim
Stability and storage data for the supplied batch
Peptides Lab UK supplies TB-500 on this basis. View our research-grade TB-500 listing for batch documentation, packaging and pricing.
How to evaluate any UK TB-500 supplier
Five questions to ask any UK supplier before placing a research-grade order. (1) Does each batch ship with a third-party HPLC COA? (2) Is mass-spectrometry identity confirmation available? (3) Is the labelling research-use-only with no human-use claims? (4) Is the supplier transparent about source manufacturing and storage chain? (5) Does the supplier publish stability data for the supplied batch? Any ‘no’ or vague answer is a red flag in the current UK enforcement environment.
For laboratory researchers
If you are working in cell migration biology, actin chemistry, angiogenesis, or small-animal soft-tissue or cardiac repair models, TB-500 is a research reference compound with a substantial cell-biology and rodent-model publication trail. The primary literature is indexed on PubMed. For a research-grade reference sample with batch-specific HPLC and COA documentation, see the TB-500 product listing.
Frequently Asked Questions
Is TB-500 licensed in the UK?
No. TB-500 has not received MHRA, EMA or FDA marketing authorisation.
Is TB-500 banned in sport?
Yes. TB-500 is on the WADA Prohibited List and WADA-accredited laboratories run targeted assays for it.
What does the published research record cover?
In-vitro cell-biology of actin and migration, plus rodent-model soft-tissue and cardiac repair studies. Published large human clinical-trial data is not available.
What should a research-grade TB-500 reference sample come with?
Batch-specific COA, third-party HPLC purity data, mass-spectrometry identity confirmation, clear research-use-only labelling, and stability documentation.
Where can I read the source literature?
The peer-reviewed thymosin beta-4 and TB-500 literature is indexed on PubMed.
Research use only. Peptides Lab UK supplies research-use-only laboratory reference compounds with batch-specific certificates of analysis. Products are not for human or veterinary use. TB-500 is also banned in sport under the WADA Prohibited List.
William is a research analyst at Peptides Lab UK, specialising in research peptides, laboratory compounds, and sourcing standards for high-purity peptide products.
You May Also Like