Healing, hormones & brain
TB-500
Thymosin beta-4 fragment
A fragment of thymosin beta-4, a repair protein. Mostly studied in animals.
What it is
A synthetic peptide based on the active region of thymosin beta-4, a natural protein involved in cell movement and wound repair. It has been widely used in veterinary and horse-racing settings.
How it's thought to work
Thymosin beta-4 helps cells move into injured tissue and supports new blood-vessel formation.
What the evidence shows
The full thymosin beta-4 protein has been tested in small human trials for eye and skin wounds, with mixed results. The TB-500 fragment itself has little published human research.
Regulatory status
Not approved for human use. Prohibited by WADA.
Safety notes
Human safety data are lacking.
Key sources
- Goldstein AL, et al. Thymosin β4: a multi-functional regenerative peptide. Expert Opin Biol Ther. 2012. Find on PubMed
Educational summary only, not medical advice. Gtides does not sell or link to sellers of TB-500 or any other product. Products sold as “research peptides” are not approved medicines, and their contents, purity and sterility are not verified.