YK11 although lumped into the SARM category is actually a myostatin inhibitor. Myostatin inhibits muscle growth. By inhibiting the inhibitor, YK11 promotes rapid muscle growth. YK11 has been shown to be more anabolic than dihydrotestosterone (DHT).
Although just discovered in 2011, YK11 is quickly developing a reputation as the most powerful SARM.
*Not for human consumption