What it is
TB-500 is a synthetic peptide corresponding to an active region of Thymosin Beta-4 (Tβ4), a protein involved in actin regulation and cell motility. It is important to distinguish TB-500 (the research peptide) from full-length Tβ4, which has itself been the subject of some clinical investigation. TB-500 is not an approved drug.
What researchers are studying
- Regulation of actin, a cytoskeletal protein central to cell movement and repair (studied via Tβ4 biology).
- Promotion of cell migration and angiogenesis in wound-healing models.
- Investigated anti-inflammatory and tissue-remodeling effects in animal studies.
Areas studied
- Soft-tissue and muscle repair (preclinical)
- Cardiac tissue repair models (largely via Tβ4, preclinical)
- Wound healing and cell migration (preclinical)
Evidence summary
Human research
Peer-reviewed human clinical evidence specific to TB-500 is minimal. Some human research exists for full-length Thymosin Beta-4 in areas such as wound healing and ocular surface repair, but those findings should not be assumed to transfer directly to the TB-500 fragment sold for research use.
Preclinical & animal research
Most TB-500/Tβ4 research is preclinical, examining actin regulation, cell migration, angiogenesis, and tissue remodeling in animal and cell-culture models. These results are exploratory and have not been confirmed for the TB-500 peptide in large human trials.
Limitations & uncertainties
- Human data specific to TB-500 is very limited; much evidence pertains to full-length Tβ4.
- Findings are primarily from animal and in-vitro studies.
- Unregulated market means purity and composition vary widely.
Safety & research considerations
TB-500 is not an approved medicine, and controlled long-term human safety data is lacking. It is banned in most competitive sports under anti-doping rules. This page does not provide dosing guidance.
Frequently asked questions
- Is TB-500 the same as Thymosin Beta-4?
- Not exactly. TB-500 is a synthetic peptide based on an active fragment of Thymosin Beta-4 (Tβ4). Some human research exists for full-length Tβ4, but evidence specific to TB-500 is minimal.
- Is TB-500 allowed in sports?
- No. TB-500 is prohibited by the World Anti-Doping Agency (WADA) and most sporting bodies.
References & further reading
Curated literature searches on PubMed and clinical-trial registries. A formal, per-study citation list is being expanded during ongoing editorial review.