What it is
TB-500 (Thymosin Ī²-4 Acetate) is a synthetic version of the active region of Thymosin Ī²-4, a naturally occurring 43-amino-acid peptide found in virtually all human cells. It promotes cell migration, reduces inflammation, and stimulates the formation of new blood vessels, accelerating recovery in muscles, tendons, and ligaments. Indirect anti-aging benefits include enhanced healing, decreased inflammation, and improved flexibility ā supporting physical resilience and long-term vitality.
Mechanism of action
Thymosin Ī²-4 sequesters G-actin, regulating cytoskeletal dynamics essential for cell motility. It also upregulates VEGF, stimulates endothelial cell migration, and has anti-inflammatory effects via reduced NF-ĪŗB activation.
Half-life: Plasma half-life ~2 hours; extended tissue activity due to lipid-binding.
Evidence summary
Demonstrated in preclinical models to accelerate healing of myocardial injury, corneal wounds, and skin. Phase 1/2 human trials have explored it for pressure ulcers and dry eye. No FDA approval for systemic use.
Typical dosing protocols
- Loading phase: 2ā5 mg twice weekly for 4ā6 weeks
- Maintenance: 2 mg once weekly for 4ā6 weeks
- Commonly stacked with BPC-157 for compound injury support (Wolverine protocol)
Side effects & safety
- Transient fatigue or head-rush in first few injections
- Possible mild redness at injection site
- Limited long-term human safety data
Cited studies
- Malinda KM, Sidhu GS, Mani H, et al. (1999). Thymosin Ī²4 accelerates wound healing. Journal of Investigative Dermatology.PMID 10469330Read source ā
- Goldstein AL, Hannappel E, Kleinman HK (2005). Thymosin Ī²4: actin-sequestering protein moonlights to repair injured tissues. Trends in Molecular Medicine.PMID 16169269Read source ā
- Bock-Marquette I, Saxena A, White MD, et al. (2004). Thymosin Ī²4 activates integrin-linked kinase and promotes cardiac cell migration, survival and cardiac repair. Nature.PMID 15525990Read source ā
- (2007). The peptide thymosin Ī²4 (TĪ²4) promotes angiogenesis and wound healing. Annals of the New York Academy of Sciences (ScienceDirect).Read source ā
- (2021). A first-in-human, randomized, double-blind, single- and multiple-dose, phase I study of recombinant human thymosin Ī²4 in healthy Chinese volunteers. Frontiers in Pharmacology (NLM).Read source ā
- Goldstein AL, Kleinman HK (2015). Advances in the basic and clinical applications of thymosin Ī²4. Expert Opinion on Biological Therapy.Read source ā
- (2015). Potential Role of Thymosin Beta 4 in Liver Fibrosis. International Journal of Molecular Sciences (Pusan National University).Read source ā
- (2018). Matrigel uses in cell biology and for the identification of thymosin Ī²4, a mediator of tissue regeneration. Heliyon (SpringerOpen).Read source ā
- (2021). New Directions in Anti-Aging Regenerative Therapies. International Journal of Molecular Sciences (NLM).Read source ā
All content is for research and educational purposes. Peptides described are sold for laboratory research use only and are not intended to diagnose, treat, cure, or prevent any disease. Always consult a qualified healthcare professional before beginning any protocol.