TB-500 (Thymosin Beta-4 Fragment): What the Research Shows

Research Use Only: This article summarises published scientific literature for laboratory and research audiences. It is not medical advice, and TB-500 is not approved for human or veterinary use.

What is TB-500?

TB-500 is a synthetic peptide corresponding to an active region of thymosin beta-4, a naturally occurring protein involved in actin regulation. In the research literature TB-500 is studied as a model compound for cell-migration and actin-related pathways, and it is frequently examined alongside other tissue-research peptides.

Where TB-500 sits in the research literature

The TB-500 and thymosin beta-4 evidence base is largely made up of in vitro and animal studies. Human clinical data are limited, so findings from laboratory models should not be extrapolated to people.

Reported areas of preclinical interest

• Actin binding: thymosin beta-4 is a well-known actin-sequestering protein, and TB-500 is studied for related activity.
• Cell migration: laboratory models examine effects on cell movement and wound-model dynamics.
• Angiogenesis pathways: some studies explore vascular-related signalling in cell culture.

Chemistry at a glance

TB-500 is a short synthetic peptide based on the actin-binding domain of thymosin beta-4, typically supplied as a lyophilised powder for laboratory reconstitution. These are physicochemical properties relevant to handling, not indications of any human use.

Why the “research use only” label matters

TB-500 is not approved for human use and appears on the World Anti-Doping Agency prohibited list. Research-grade material is intended strictly for laboratory and scientific work and is not for human or veterinary consumption.

Handling and storage

Store lyophilised peptide cool, dry and away from light, and refrigerate reconstituted solution, using it within the indicated stability window. Follow the documentation supplied with the product.

Frequently asked questions

What is the difference between TB-500 and thymosin beta-4?

TB-500 is a synthetic peptide based on an active fragment of the larger thymosin beta-4 protein. They are related but not identical.

Is TB-500 approved for human use?

No. It is a research material only and is not intended for human or veterinary use.

Is TB-500 banned in sport?

Yes, it appears on the WADA prohibited list, which is relevant for sport-adjacent research.

Key takeaways

TB-500 is a synthetic thymosin beta-4 fragment studied in preclinical models for actin and cell-migration pathways. Human evidence is limited and it is a research material only. Review the TB-500 research product, or the BPC-157 / TB-500 mix.

References

References sourced via PubMed.

1. Goldstein AL, Hannappel E, Sosne G, Kleinman HK. Thymosin β4: a multi-functional regenerative peptide. Basic properties and clinical applications. Expert Opin Biol Ther. 2012;12(1):37-51. DOI · PubMed 22074294.
2. Hannappel E. Beta-thymosins. Ann N Y Acad Sci. 2007;1112:21-37. DOI · PubMed 17468232.

Disclaimer: This article is for informational and educational purposes for a research audience. It is not medical advice. Products referenced are sold strictly for laboratory research and are not for human or veterinary use.