TB-500

TB-500 is commonly sold as the synthetic analog of Thymosin Beta-4 (Tβ4), but there is a critical distinction that is rarely explained clearly: 🔬 TB-500 FRAGMENT (7 amino acids — AA 17–23): The form most commonly sold as 'TB-500' is actually a synthetic 7-amino acid fragment derived from amino acids 17 through 23 of the full Thymosin Beta-4 molecule. This fragment contains the core actin-binding domain (LKKTETQ) responsible for local tissue repair and cell migration. It is highly targeted, fast-acting, and focused on rapid local healing at the site of injury. It does NOT replicate the full systemic effects of the complete 43-amino acid molecule. 🧬 THYMOSIN BETA-4 — Full Molecule (43 amino acids): The complete Thymosin Beta-4 (Tβ4) is a 43-amino acid polypeptide naturally produced in virtually every cell of the body. Unlike the fragment, the full molecule drives broad systemic healing — including stem cell activation, angiogenesis (new blood vessel formation), cardiac repair, neurological recovery, and immune modulation. It operates body-wide, not just at the injury site. ⚠️ These two forms are often marketed interchangeably, but they are NOT the same compound. Understanding which form you are working with matters for your research protocol.