The thymosin beta-4 fragment studied for cell migration and tissue models.
TB-500 is a synthetic peptide related to thymosin beta-4, a 43-amino-acid protein found in nearly all human and animal cells. It is one of the most frequently searched compounds in recovery research, and one of the most frequently confused with BPC-157.
Thymosin beta-4 is a naturally occurring actin-binding protein. TB-500 is a synthetic version built around the active region of that protein. Actin is the structural protein cells use to move and change shape, which is why TB-500 research centres on cell migration.
Laboratory studies of thymosin beta-4 examine how cells move toward sites of tissue disruption. Actin regulation is the mechanism most often discussed.
Published work has looked at blood-vessel formation and tissue-repair markers in cell culture and animal models. As with all peptide literature, results from models do not establish outcomes in any other setting.
The two are studied for different mechanisms: BPC-157 is examined around localized repair signalling and gut-lining models, while TB-500 is examined around cell migration. That is why they are often researched together. Read the full comparison →
All of the above is research context from laboratory models. TB-500 is supplied for research use only and is not a treatment.
Ask for a batch-specific third-party COA showing HPLC purity and mass-spectrometry identity. Here is how to read one.
View BPC-157 + TB-500 research blend →