TB-500 UK — Thymosin Beta-4, Actin Binding & Research Use
Coming soon — we don't stock TB-500 as a standalone vial yet. This guide is reference only. See what's in stock.
Also known as Thymosin Beta-4 fragment
TB-500 is a synthetic peptide corresponding to the active region of Thymosin Beta-4, a naturally occurring protein found in most human cells and in high concentration in wound fluid and platelets.
It is the most-cited counterpart to BPC-157 in the tissue-repair research literature, though the two act through entirely different mechanisms.
For in vitro research use only — not for human or animal consumption. Not a licensed medicine in the UK. Nothing on this page is medical advice.
What is TB-500?
Thymosin Beta-4 is a 43-amino-acid protein. TB-500 reproduces the short active sequence responsible for its actin-binding property, which makes it easier to synthesise and more stable than the full protein while retaining the property of research interest.
Actin regulation and cell migration
Actin is the cytoskeletal protein that gives cells their structure and enables them to move. Thymosin Beta-4 is one of the main actin-sequestering proteins in the body — it binds monomeric actin and regulates how readily it polymerises.
Preclinical literature associates TB-500 with cell migration, angiogenesis and downregulation of inflammatory signalling in injury models. This is research context, not medical guidance.
TB-500 vs BPC-157
BPC-157 acts largely through growth-factor and vascular signalling pathways. TB-500 acts on the cytoskeleton and cell motility. Because they intersect at different points, research protocols frequently run them together rather than choosing between them.
Handling and storage
Supplied lyophilised. Store sealed vials refrigerated at 2–8°C and protected from light.
Buying this peptide in the UK
- UK-held stock — Same-day Royal Mail Tracked 24 dispatch on orders by 1pm, Monday to Friday.
- Royal Mail tracked with photo confirmation on every parcel.
- Independent HPLC and mass-spec testing with a batch-matched Certificate of Analysis.
- Discreet plain packaging and normal UK card checkout — no crypto required.
- buy BPC-157 UK — stock, pricing and vial sizes
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View full shopFrequently asked questions
Is TB-500 the same as Thymosin Beta-4?
No. TB-500 is a synthetic fragment reproducing the active actin-binding region of Thymosin Beta-4, rather than the complete 43-amino-acid protein.
Is TB-500 legal in the UK?
TB-500 is legal to buy and possess in the UK for laboratory research purposes. It is not a licensed medicine in the UK, is not prescribed by the NHS, and is supplied strictly for in vitro research use only — not for human or animal consumption.
How is TB-500 reconstituted?
TB-500 is supplied as a sealed lyophilised vial. We do not provide preparation or usage guidance; it is sold for in vitro research use only.
Do you supply a Certificate of Analysis for TB-500?
Yes. Our batches are independently HPLC and mass-spec tested and the batch number on the vial matches a published Certificate of Analysis, so purity can be verified before use.
How fast is UK delivery?
Stock is held in the UK. Orders are shipped the same day when ordered by 1pm, Monday to Friday, via Royal Mail tracked with photo confirmation, in discreet plain packaging with no product names on the outside.
Disclaimer: All products sold by Peptides UK 4U are for laboratory and research purposes only. They are not intended for human or animal consumption, diagnosis, treatment or prevention of any disease.