A lab-made piece of thymosin beta-4, a protein your own cells make.
Commonly described as L K K T E T Q, with a chemically capped start (Ac-). It copies one short piece of a 43-block protein.
Load it in the Peptide builder →Lab-made. Thymosin beta-4 is a 43-amino-acid protein found in most of your cells. TB-500 copies the short piece thought to do the work.
The full protein, thymosin beta-4, has been tested in small human trials as eye drops for corneal healing.
TB-500 itself: wound and tissue repair in animal and cell studies.
Studied for ≠ proven to work. Check the stamp.
I found no published human trials on TB-500 itself.
Results from the full protein in eye drops cannot be assumed for TB-500.
Like BPC-157, it may help grow new blood vessels. In theory, that could also feed a hidden tumor.
I took TB-500 together with BPC-157 after my ACL surgery. A year on, I run 5K three times a week and box. Whether either one helped, or what each did on its own, the research can't say. That's what I'm digging into.
LyChecked: 9 Oct 2026
