Physician PracticeResearch Use OnlyWADA Prohibited
TB-500
Thymosin Beta-4 — a naturally occurring peptide studied for cell migration, soft-tissue repair, and wound healing in preclinical and physician-practice research contexts.
EVIDENCE STATUSPhysician practice / limited human data
WADA STATUSProhibited — S2 Peptide Hormones
Overview
TB-500 is a synthetic version of Thymosin Beta-4 (Tβ4), a 43-amino acid peptide found naturally in high concentrations in blood platelets, wound fluid, and most tissues. It is best known for its role in regulating actin — a protein essential for cell structure and movement — and is studied for its potential to promote tissue repair and regeneration.
In preclinical research, TB-500 has demonstrated effects on cell migration, angiogenesis, collagen deposition, and wound closure. Its mechanism centers on binding G-actin and promoting upregulation of cell-building proteins, which researchers believe underlies its observed effects on soft-tissue healing.
Human clinical data is limited. Phase I/II trials investigated Tβ4 in cardiac repair contexts. Physician-practice use in recovery contexts is predominantly based on extrapolation from animal research. TB-500 is not FDA-approved and is prohibited under WADA regulations.
Research Areas
Cell migration and motilitySoft-tissue and tendon repairWound healing and angiogenesisAnti-inflammatory effectsCardiac repair researchActin regulation
Available Evidence3 categories
HumanPhase I/II trials investigated Thymosin Beta-4 in cardiac applications. Limited physician-practice data in soft-tissue recovery contexts. No controlled RCTs for athletic or recovery use specifically.
In VitroCell culture studies confirm actin-binding activity and promotion of cell migration. In vitro angiogenesis models show VEGF upregulation and endothelial cell sprouting.
UncertainSpecific athletic recovery claims and dose-response relationships have not been established in controlled human trials. Extrapolation from animal data is significant.
Documented Research Benefits6 documented
Soft-tissue repair
preclinical
Wound healing
preclinical
Cell migration promotion
in vitro / preclinical
Angiogenesis support
in vitro / preclinical
Anti-inflammatory effects
preclinical
Tendon and ligament healing
preclinical
Research Pairings3 common
BPC-157
Primary pairing — complementary mechanisms. BPC-157 focuses on structural repair while TB-500 targets cell migration and systemic recovery signaling.
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Safety & Regulatory Status
TB-500 is not approved by the FDA for any indication and is prohibited under WADA regulations as a peptide hormone analog. Sold strictly for research use only — not for human consumption or self-administration.
Long-term human safety data is not established. All information is for educational reference only and does not constitute medical advice.