YK11 is another great SARM, also named as ‘super SARM’ by many who have used it due to its potency. YK11 is a synthetic and steroidal SARM (Selective Androgen Receptor Modulator). It is a partial agonist which is also gene selective to androgen receptors. YK11 does not induce any physical interaction between the NTD/AF1 and LBD/AF2 which are known as N/C interaction, this system is required for the full transactivation of androgen receptors.