YK-11 is one of the best possible additions to any mass cycle. YK-11 provides some of the best strength gains and best pumps you can. It also acts as a “myostatin inhibitor”. Your body has an internal governor, similar to how vehicles have governors to prevent them from going 200mph? Your body has a similar system to prevent you from becoming 500 lbs. This helps push that regulator back.

Optimal cycle length: 12-16 weeks
Optimal post cycle: Clomid
Optimal dose: 2 caps per day
Optimal stack: YK11, LGD4033, and MK677