Peptides

TB-500 (Thymosin Beta-4): Tissue Repair Peptide Guide

Medically reviewed by Medical Advisory Board Last reviewed 2026-05-13

How TB-500 promotes healing through actin regulation and angiogenesis

TB-500 is a synthetic version of Thymosin Beta-4, a naturally occurring peptide that regulates actin — the protein responsible for cell movement and tissue repair. It's used to accelerate healing of injuries, reduce inflammation, and promote angiogenesis.

TB-500 (Thymosin Beta-4, or Tβ4) is a 43-amino-acid peptide naturally produced in almost every cell and tissue in the body, with the highest concentrations at sites of injury. It plays a fundamental role in tissue repair by regulating actin — the structural protein that enables cells to move, which is essential for wound healing, inflammation response, and new blood vessel formation (angiogenesis).

In sports and biohacking communities, TB-500 is primarily used for injury recovery — particularly for tendons, ligaments, and muscle tears that respond slowly to conventional rehabilitation. It's often stacked with BPC-157 in the "wolverine stack," with the rationale that BPC-157 targets local repair signaling while TB-500 promotes the systemic vascular support (angiogenesis) needed to deliver repair cells to injury sites. TB-500 is one of the most-used healing peptides in peptide therapy.

TB-500 Benefits

  • Angiogenesis: TB-500 promotes formation of new blood vessels through upregulation of vascular endothelial growth factor (VEGF) and other angiogenic factors. This improves blood supply to injured tissues, which is rate-limiting for healing in avascular structures like tendons.
  • Fibroblast migration: Regulates actin in fibroblasts (the cells that produce collagen), enabling them to migrate to injury sites and accelerate tissue remodeling.
  • Anti-inflammatory: Reduces inflammatory cytokines at injury sites while preserving immune function needed for repair.
  • Muscle healing: Multiple animal studies show accelerated repair of muscle injuries with reduced fibrosis and better functional recovery.
  • Cardiac protection: Research in cardiac injury models shows TB-500 promotes cardiomyocyte survival and angiogenesis — an area of active pharmaceutical research.
  • Hair growth: Some evidence for TB-500 promoting hair follicle stem cell activation, though this is not a primary clinical use.

TB-500 Dosage (Research Reference)

Standard TB-500 protocols from research and clinical contexts:

  • Loading phase: 2–2.5 mg twice weekly × 4–6 weeks (for active injury)
  • Maintenance phase: 2–2.5 mg once weekly or every 2 weeks
  • Administration: Subcutaneous injection, TB-500 distributes systemically (unlike BPC-157 which is more effective locally injected)
  • Wolverine stack: TB-500 2 mg 2x/week + BPC-157 250–350 mcg daily for 4–6 weeks during active injury; TB-500 2 mg weekly + BPC-157 250 mcg daily for ongoing maintenance

TB-500 vs BPC-157: Key Differences

FactorTB-500BPC-157
Primary mechanismActin regulation, angiogenesisGrowth factor receptor upregulation, NO modulation
DistributionSystemic (distributes broadly)Works best near injury site when injected locally
Half-lifeLonger (suitable for less frequent dosing)Shorter
Best forSystemic support, vascular supply, muscleTendon, gut, nerve, local tissue repair
FDA status (2024)Research chemicalAdded to difficult-to-compound list
Typical dose2–2.5 mg 2x/week (loading)250–350 mcg daily

Frequently Asked Questions

What is TB-500?

TB-500 is a synthetic version of Thymosin Beta-4, a naturally occurring peptide present in virtually every cell and tissue. It promotes tissue repair by regulating actin (which enables cell movement), promoting angiogenesis (new blood vessel formation), and supporting fibroblast migration to injury sites.

What is the difference between BPC-157 and TB-500?

BPC-157 and TB-500 work through different mechanisms. BPC-157 primarily upregulates growth hormone receptors locally and modulates nitric oxide, working best when injected near the injury site. TB-500 regulates actin and promotes systemic angiogenesis, distributing throughout the body from any injection site. They're frequently combined in the 'wolverine stack' because they address complementary aspects of tissue repair.

What is TB-500 (TB 500) used for?

TB-500 is used primarily for accelerating recovery from tendon, ligament, and muscle injuries — especially those that respond slowly to conventional rehabilitation. Secondary uses include cardiac tissue protection (in research), anti-inflammatory effects, and potentially hair growth promotion.

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M
Medically Reviewed
Medical Advisory Board
Board-Certified Physician
Last reviewed: 2026-05-13
Medical Disclaimer: This content is for informational purposes only and does not constitute medical advice. Always consult a qualified healthcare provider before making changes to your health regimen.

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