TB-500

How it works

Thymosin beta-4's actin-grabbing stretch; actin is the filament cells crawl with. Sold to speed muscle and tendon repair.

What it's made of

7 amino acids (Ac-LKKTETQ): positions 17 to 23 of thymosin β4, a 43-amino-acid protein that traps actin. It was identified in 2012, in a product suspected of doping.

What it's for

Prescribed for

Nothing.

Sold as

Recover faster from muscle and tendon injuries.