Research Use Only. TB-500 is not an approved medicine and not for human use. Nothing here is medical advice. Note also a common confusion: TB-500 is a synthetic fragment marketed in reference to Thymosin β4 (Tβ4) — they are related but not identical, and much cited data is actually on Tβ4.
What it is
TB-500 refers to a synthetic peptide corresponding to an active region of Thymosin β4, a naturally occurring 43-amino-acid protein involved in cell repair. Research-grade "TB-500" is typically a shorter fragment sold RUO. It is discussed alongside BPC-157 as a "healing" peptide.
Proposed mechanism
Actin regulation. Thymosin β4's core biology is binding/sequestering G-actin, regulating the cytoskeleton — which supports cell migration central to wound repair.1
Angiogenesis & anti-inflammatory effects are reported in preclinical models.2
Read carefully: most of this mechanism is established for the full Tβ4 protein in animal/cell studies — extrapolating it wholesale to injected "TB-500" fragment in humans is exactly the kind of leap Chapter 3 (Myth vs. Research) warns about.
Pharmacology
Parent
Thymosin β4 (43 aa protein)
Marketed form
Synthetic active-region fragment (RUO)
Half-life
Not well characterized in humans
Mechanism anchor
G-actin binding → cell migration
State of the evidence
Preclinical: supportive animal/cell data for Tβ4.
Human: minimal for TB-500 specifically; no Phase III RCTs.2
For educational and research purposes only. This content is not medical advice. Compounds referenced are research use only and not intended to diagnose, treat, cure, or prevent any disease. Free Peptide University does not sell compounds.