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TB-500 (Thymosin Beta-4)

TB-500 (thymosin beta-4) dosing, mechanism of action, side effects, and tissue repair benefits. Complete reference guide.

RegenerativeSubcutaneous injection (SC, IM, IV, topical, ophthalmic)5mg twice weekly for 4-6 weeks

Overview

Thymosin Beta-4 (Tβ4) is a 43-amino acid peptide naturally present in most tissues and cell types. It plays a critical role in tissue repair, cell migration, and anti-inflammatory processes.

Mechanism of Action

  • Actin regulation — Sequesters G-actin, promoting cell migration and wound healing
  • Anti-inflammatory — Reduces pro-inflammatory cytokines at injury sites
  • Angiogenesis — Promotes new blood vessel formation
  • Stem cell mobilization — Encourages cardiac progenitor cell migration
  • Anti-fibrotic — Reduces scar tissue formation

Dosing Protocols

| Phase | Dose | Frequency | Duration | |-------|------|-----------|----------| | Loading | 5-10mg | Twice weekly | 4-6 weeks | | Maintenance | 2-5mg | Once weekly | Ongoing |

Safety Profile

Tβ4 is naturally occurring in the body, contributing to a generally favorable safety profile. Human data is limited; most evidence comes from preclinical studies and clinical case reports.

Last updated: 2026-03-27