TB-500
A synthetic version of a naturally occurring fragment of Thymosin Beta-4, studied for its role in cell migration and tissue repair.
Overview
TB-500 is a synthetic version of a naturally occurring peptide fragment derived from Thymosin Beta-4 (Tβ4), a protein present in nearly all human and animal cells that plays a role in actin regulation and cell structure. Research on Tβ4 and its fragments dates back to studies on wound healing and cell migration beginning in the 1990s and 2000s, with a substantial share of the published literature originating from veterinary and animal-performance research, particularly in horses.
Mechanism of Action
TB-500’s proposed activity centers on its interaction with actin, a structural protein that forms the cytoskeleton of cells. By binding actin monomers, Tβ4-derived peptides are thought to promote the movement of cells — such as endothelial cells and keratinocytes — toward damaged tissue, supporting the cell-migration phase of wound repair. It has also been studied for anti-inflammatory signaling and modulation of new blood-vessel formation (angiogenesis).
Cited Research
Actin regulation & cell migration
Characterized the actin-binding domain responsible for Tβ4’s proposed role in cytoskeletal dynamics and directed cell movement.
Dermal wound-healing models
Examined topical and systemic administration of Tβ4-derived peptides on wound closure rates in rodent skin-injury models.
Cardiac & corneal repair research
Explored Tβ4’s role in post-injury repair signaling in tissues beyond skin, including cardiac and ocular models.
Veterinary & equine research
A substantial share of the published TB-500 literature comes from veterinary research into soft-tissue injury recovery in performance animals.
This is a summary, not an exhaustive review. Search the primary literature yourself: Thymosin Beta-4 on PubMed →
Safety & Handling
TB-500 should be handled only by qualified personnel in a laboratory setting: stored per the accompanying Certificate of Analysis, reconstituted with bacteriostatic water immediately before use in an experimental protocol, and kept refrigerated once reconstituted. It is not evaluated or approved by the FDA for any human or veterinary use.
Frequently Asked Questions
Is TB-500 the same as Thymosin Beta-4?
TB-500 is derived from a specific active region of the full Thymosin Beta-4 protein, not the entire molecule. Researchers often work with the fragment because it’s smaller and easier to synthesize consistently.
Is TB-500 legal to purchase?
It’s legal to sell and purchase as a research chemical for laboratory use in the U.S. It is not approved by the FDA as a drug or supplement for human consumption.
How should TB-500 be stored?
Keep the lyophilized powder refrigerated or frozen prior to reconstitution. Once reconstituted with bacteriostatic water, keep refrigerated and use within the timeframe on its Certificate of Analysis.
Is this page medical advice?
No. This page summarizes published preclinical literature for research and educational context only. It does not recommend a dose, protocol, or use in humans or animals outside a laboratory setting.
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