TB-500 (Synthetic Thymosin Beta-4, 43-AA) is the second most popular repair peptide after BPC-157 and its most frequent stacking partner. While BPC-157 focuses on gut and fibroblast/collagen, TB-500 regulates the actin cytoskeleton to drive systemic cell migration and tissue regeneration. Naturally occurring in nearly all tissues, TB-500 is upregulated after injury to promote healing. It is the top trending compound for muscle tear and strain recovery, joint inflammation and tendon stress research, wound healing and skin repair, and sports recovery and post-surgical rehabilitation.
TB-500 repairs through four coordinated cellular pathways. 1. ACTIN REGULATION: TB-500 binds G-actin monomers, maintains actin pool, prevents premature polymerization, promotes rapid actin filament assembly at leading edge of migrating cells, enables cytoskeletal remodeling for cell movement. TB-500 binds G-Actin → sequesters G-actin → prevents premature polymerization → F-Actin Filament Polymerization → lamellipodia formation → cell motility. 2. CELL MIGRATION: Stimulates epithelial & endothelial cell migration, upregulates Zyxin & Integrin-Linked Kinase (ILK), activates Akt/PI3K pathway → lamellipodia formation, accelerates wound closure & tissue repair. 3. ANGIOGENESIS: Promotes endothelial cell migration & tube formation, enhances VEGF signaling & new blood vessel growth, supports nutrient/oxygen delivery to healing tissue, activates PI3K/Akt/eNOS pathway. 4. ANTI-INFLAMMATORY & HEALING: Downregulates NF-κB → reduces pro-inflammatory cytokines (TNF-α, IL-1β, IL-6), lowers oxidative stress & inflammation response, modulates collagen/ECM remodeling & MMP activity, reduces scarring, supports regenerative healing. Clinical outcomes: accelerated wound healing, tissue regeneration, reduced inflammation & fibrosis, enhanced vascularization, protection of cardiac & neural tissues.
Our TB-500 lineup is supplied as high-purity lyophilized powder (>99% HPLC) with COA. For standard research, TB-500 5mg (most requested) and TB-500 10mg (value high-dose) are available. For synergistic repair protocols, BPC-157 5mg + TB-500 5mg Blend / 10mg Blend is the gold standard, combining fibroblast/collagen activation (BPC-157) with actin-driven cell migration (TB-500) for complete tendon, ligament, muscle and joint recovery. TB-500 belongs to Repair & Anti-Aging Peptides category alongside BPC-157, GHK-Cu, Epithalon and KPV. Stable 24 months at -20°C. For Research Use Only, not for human consumption.