Follistatin 344 is a performance enhancer that has been recently gaining a lot of popularity. Simply put it is a protein. It is high in non-essential amino acid cysteine, but with attached carbohydrates. Its function is to bind and inhibit myostatin and other transforming growth factor peptides. These peptides prevent the body from putting on additional muscle fast. Suppress transforming growth factor peptides and you get a body that can put up an impressive amount of muscle really fast, up to of 1-2lbs of muscle mass daily.