YK-11 is a strong Selective androgen receptor modulator supplement (SARM) scientifically proven to increase lean muscle mass with minimal side effects. YK-11 acts as a partial agonist at androgen receptors and stimulates high level of follistatin production, inhibiting myostatin – a protein that naturally occurs in the body limiting muscle growth. YK-11 helps reduce the effect of myostatin, increasing the potential of muscle growth.
Understanding SARMS and their properties is essential if you are a beginner. Please research and investigate very carefully first!