What is myostatin? thank you..

LookItUp. MuscleStop: Myostatin: a protein, one of millions produced by cells. Myo=muscle. Statin=stop. Thus name indicates agent which in some way stops muscle cells. Most evidence seems to be that it plays a role is limiting over-development of muscle tissue. While many think lots of muscle is good, too much, wrong place: huge problems, to the point of death. Life is all about complex balances, controls & outcomes.

Myostatin: Myostatin is a growth differentiation factor. It's produced in skeletal muscle cells and it's involved in muscle enlargement. Mutations in humans that reduce myostatin production can result in muscle enlargement. This has been followed with great interest by the agricultural industry (as a way to help "beef up" their beef).