YK11 vs RAD 140: Which is Better? YK11 must be taken twice daily for full effect because of its 12-hour half-life, while RAD 140 has a 60-hour half-life. YK11 is just as potent as RAD 140 and can be quite effective for building massive muscle against mild suppression. However, YK11 has the upper hand in … Continue reading RAD 140 vs YK11