YK-11 10mg is a myostatininhibitor that promotes muscle growth. It isknown for its ability to increase muscle massand strength and can also reduce fat. Theprotein myostatin interferes with the body’sability to build muscle and get stronger, whileanother protein, follistatin, promotes muscleand strength gains. When you take YK-11, youreduce myostatin levels and increasefollistatin levels. However, you should stilladjust your diet and exercise routine, because nothing comes from nothing.