Descriptions about YK11 YK-11 is a synthetic, steroidal selective androgen receptor modulator (SARM). It is a gene-selective partial agonist of the androgen receptor (Arkansas) and does not induce the physical interaction between the NTD/AF1 and LBD/AF2 (known as the N/C interaction), which is required for full transactivation of the AR. The drug has anabolic activity in vitro in C2C12 myoblasts …