TB-500: thymosin β-4 in research

BritishPeps research team · Updated 18 July 2026 · ~6 min read

TB-500 is a familiar name in recovery-focused peptide research and is usually mentioned alongside BPC-157. This guide explains what TB-500 is, what questions the scientific literature asks and how it is handled in the laboratory. It is purely educational: TB-500 is supplied exclusively for in-vitro laboratory research and is not intended for human or veterinary use.

What is TB-500?

TB-500 is a synthetic peptide corresponding to the biologically active region of thymosin β-4, a naturally occurring protein involved in cell structure. Rather than the full protein, TB-500 reproduces the short fragment most associated with actin binding, which makes it a practical and stable reference compound. It ships as a lyophilised powder; the full molecular data and the written specification are on the TB-500 product page.

What do the research models explore?

Actin regulation — TB-500's defining property in the scientific literature is its interaction with actin, a protein central to cell movement.
Cell migration — how cells move into an area, an essential step in tissue-repair models.
Angiogenesis — the formation of new blood vessels, studied alongside repair.

As always, this describes what scientists are investigating in preclinical and in-vitro settings, not demonstrated outcomes in any living organism.

TB-500 and BPC-157

TB-500 and BPC-157 are often studied together because they are associated with different repair pathways: actin and cell migration for TB-500, angiogenesis and cytoprotection for BPC-157. That is why they appear combined in research blends such as GLOW 70 and KLOW 80. For more on the pairing, see our BPC-157 research overview.

Handling and storage

TB-500 ships lyophilised and is stored at −20 °C, protected from light. It is reconstituted with bacteriostatic water and thereafter kept refrigerated at 2–8 °C. Our reconstitution guide and the calculator cover the process and the concentration arithmetic.

Frequently asked questions

Is TB-500 for human use?

No. TB-500 is supplied exclusively for in-vitro laboratory research and is not intended for human or veterinary use.

Is TB-500 the same as thymosin β-4?

Not quite. TB-500 reproduces the active fragment of thymosin β-4 rather than the whole protein, and that is precisely what makes it a practical reference compound.

Why is TB-500 studied alongside BPC-157?

They are associated with different, complementary repair pathways, so recovery-focused research often examines them together — hence the well-known blends.

For research use only. This content is educational. The products mentioned are supplied exclusively for scientific and in-vitro laboratory research, not for human or veterinary use. You must be 18 or over to place an order.