Thymosin β4 (Tβ4)
Muscle/RecoveryActin-sequestering peptide / researchExperimental
43-aa G-actin-sequestering peptide studied for wound healing and cardiac repair (timbetasin programs). Not FDA-approved. Distinct from the shorter TB-500 fragment.
For research use only.
Key Facts
- CAS
- 77591-33-4
- Molecular Weight (MW)
- ≈4963 g/mol
- Half-life
- Not well established in humans
- Unit
- mcg
- Administration Route
- —
- Frequency
- —
- Last updated
- 8/23/2026
- Targets
- G-actin
Overview
43-aa G-actin-sequestering peptide studied for wound healing and cardiac repair (timbetasin programs). Not FDA-approved. Distinct from the shorter TB-500 fragment.
Protocol
- Dosage Range
- Not established for humans
- Frequency
- —
- Cycle
- —
- Administration Route
- —
- Reconstitution Guide
- —
Science
Mechanism of Action
Sequesters G-actin (via LKKTETQ), promoting cell migration, angiogenesis, and reduced inflammation in injury models.
Targets
G-actin
Studies
- Thymosin beta-4 tissue repair— Journal/year not available
Benefits
Wound and cardiac-repair research
Potential Side Effects
- Limited human AE data for research vials
References
- PMID 15179181External link · Year —
- WADA Prohibited List 2026External link · Year —