Follistatin 344 is a peptide most commonly associated with serious muscle growth. It works by blocking myostatin, a protein that naturally limits how much muscle you can build. By reducing myostatins activity, Follistatin 344 may allow the body to grow more lean muscle mass than it normally would”making it popular with bodybuilders and athletes. Beyond aesthetics, increasing muscle can help improve strength, bone density, and overall metabolic health. Follistatin 344 is also being explored for its potential role in muscle-wasting diseases, although most people use it for personal fitness goals.