YK-11 is a Selective Androgen Receptor Modulator (SARM) that functions as a gene-specific agonist of the androgen receptor (AR) in MDA-MB 453 cells. The way YK-11 operates is unique, affecting various anabolic pathways. It has been found to display more significant anabolic activity in vitro in C2C12 myoblasts than dihydrotestosterone (DHT).