TB-500
A peptide. A short piece of a longer protein called thymosin beta-4. Research only. Not a protocol.
Simple words
Thymosin beta-4 is a protein already in you. It helps cells move when tissue is damaged. TB-500 is a short stretch of that protein — often the part with the letters LKKTETQ — sold as a vial. People want it for muscle, ligaments, and stiffness after a pull.
What it is
A synthetic peptide. Not the whole thymosin beta-4 protein. Not FDA-approved as a sports medicine.
What researchers studied
Allan Goldstein’s lab described thymosin beta-4 decades ago. Later animal work (eye surface, heart muscle after injury, skin wounds) is about the full protein more than the shop fragment. Healing and new small blood vessels show up in those models.
Human “I pulled a hamstring” trials for the fragment in a research vial are thin. Do not treat a horse or mouse paper as a person paper.
Papers
Goldstein, Hannappel, Sosne, Kleinman, 2012 — Review of thymosin beta-4 and tissue repair. Most papers are the full protein, not the shop fragment.
Sosne, Qiu, Goldstein, Wheater, 2010 — The short LKKTETQ stretch (what vials often copy) and what it does in cells.
What this is not
Not BPC-157. Not a steroid. This page does not tell you how much to take.