TB-500TB 500 is a substance that scientists are studying because its a man made version of a natural protein called thymosin beta 4, which is found in most cells of the body. Its made up of 43 amino acids and is being explored for its ability to help with healing and repair. Researchers think it works by boosting a protein called actin, which helps cells move and grow, making it useful for fixing damaged tissues like muscles, tendons, and ligaments. In lab