TB-500 is a synthetic fraction of the protein thymosin beta-4, which is present in virtually all human and animal cells. Thymosin beta-4 is a very large molecule. In fact, it is so large that it cannot fit entirely into the receptor. Different sections of the molecule have different activities. TB-500 is the part of thymosin beta-4 hormone which promotes the most useful effects (overall healing, repair, new blood and muscle cells). For medical applications it is more practical to use the TB-500 instead of the entire Thymosin Beta-4 protein.
TB-500 is a short peptide segment or fragment of the naturally-occurring thymosin beta-4 hormone (TB-4.) To be clear, TB-500 most emphatically is not TB-4, although it’s often sold under that name. TB-4 itself is as yet an extremely pricey, rare research material that is not yet available to bodybuilding or to equine enhancement.
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