TB-500 is a synthetic peptide based on the actin-binding region of thymosin beta-4, studied in preclinical research on wound healing, tissue repair and blood-vessel formation.
TB-500 is a synthetic version of the 43-amino-acid peptide Thymosin Beta-4 (Tβ4) — specifically the active fragment comprising amino acids 17–23 of Tβ4. Thymosin Beta-4 is one of the most abundant intracellular peptides in mammalian cells and a key regulator of actin — the cytoskeletal protein essential for cell motility, wound healing, and tissue repair.
TB-500 is a synthetic version of the 43-amino-acid peptide Thymosin Beta-4 (Tβ4) — specifically the active fragment comprising amino acids 17–23 of Tβ4. Thymosin Beta-4 is one of the most abundant intracellular peptides in mammalian cells and a key regulator of actin — the cytoskeletal protein essential for cell motility, wound healing, and tissue repair.
Mechanism: Actin Sequestration and Cell Mobility
TB-500's primary molecular function is sequestration of G-actin (globular actin monomers), preventing their polymerization into F-actin filaments and maintaining a pool of mobile actin available for directed cell migration. This action promotes the migration of keratinocytes, endothelial cells, and progenitor cells into wound sites — a rate-limiting step in tissue repair — dramatically accelerating wound closure, tendon healing, and muscle repair.
Angiogenesis, Cardioprotection, and Anti-inflammation
Beyond wound healing, TB-500 stimulates angiogenesis through upregulation of VEGF and VEGFR2. Primate studies showed TB-500 treatment after myocardial infarction resulted in new cardiomyocyte generation and improved cardiac function — positioning it in cardiac regenerative medicine research. TB-500 also downregulates NF-κB signaling, reducing pro-inflammatory cytokine production in a mechanism similar to BPC-157.
Quick Reference
Member reference tables summarize the compound's research parameters.
Accelerated healing of muscle fibers, reduced recovery time from muscle injuries, and enhanced muscle tissue repair through improved cell migration and differentiation.
Tendon & Ligament Healing
Promotes connective tissue repair, reduces scar formation, and improves biomechanical properties of healing tendons and ligaments.
Wound Healing
Enhanced dermal wound closure, improved angiogenesis, and reduced inflammation in both acute and chronic wound healing scenarios.
Athletic Recovery
Preliminary Data
Exercise Recovery
Faster recovery from intense training, reduced exercise-induced muscle damage, and improved adaptation to training stress.
Injury Prevention
Strengthened connective tissues, improved tissue resilience, and reduced risk of overuse injuries through enhanced tissue quality.
Performance Enhancement
Improved muscle fiber quality, enhanced endurance capacity, and better overall tissue function supporting athletic performance.
Neurological
Preliminary Data
Neuroprotection
Protective effects against neuronal damage, reduced neuroinflammation, and support for nervous system recovery following injury.
Spinal Cord Support
Enhanced recovery in spinal cord injury models through neuroprotective and anti-inflammatory mechanisms.
Brain Health
Potential benefits for brain injury recovery, improved neuroplasticity, and protection against neurodegenerative processes.
Research Protocols
As reported in cited literature and research-community logs (see Research Citations below), not a personal dosing recommendation.
This member section describes parameters reported in the research literature.
Included for harm-reduction awareness only, in the event this compound is encountered outside its labeled research use. Inclusion here does not imply RUO Codes endorses, recommends, or instructs human use.
This member section discusses research safety considerations and uncertainties.
TB-500 should appear as a white to off-white, fine powder that is evenly distributed in the vial. Proper lyophilization creates a light, fluffy texture.
Verified Marker
Clear Solution After Reconstitution
When properly reconstituted with BAC water, TB-500 should form a completely clear, colorless solution with no visible particles or cloudiness.
Verified Marker
Proper Vacuum Seal
Vial should have intact vacuum seal with no cracks or damage. The rubber stopper should be secure and show no signs of contamination.
Acceptable Range
Slight Powder Clumping
Minor clumping during shipping is acceptable if it dissolves completely with gentle swirling. The listed research text specifies avoiding shaking vigorously.
Quality Concern
Colored or Crystalline Powder
Any discoloration (yellow, brown) or crystalline appearance may indicate degradation or contamination. Should appear as fine white powder only.
Quality Concern
Persistent Cloudiness
If solution remains cloudy, has floating particles, or shows precipitation after reconstitution, the peptide may be degraded or contaminated.