Key Benefits: Muscle Growth & Hardening Increased Fat Loss Strength Gains Better Blood Circulation You can be proactive by taking PCT & Liver & Organ with this product. YK-11 is a synthetic steroidal selective androgen receptor modulator (SARM). It does not induce the physical interaction between the NTD/AF1 and LBD/AF2. Overall, many animal research have examined YK-11. In a 2013 Biological and Pharmaceutical Bulletin study, YK-11 increased muscular mass and strength in mice without harming the liver or other organsKey Benefits: Muscle Growth & Hardening Increased Fat Loss Strength Gains Better Blood Circulation You can be proactive by taking PCT & Liver & Organ with this product. YK-11 is a synthetic steroidal selective androgen receptor modulator (SARM). It does not induce the physical interaction between the NTD/AF1 and LBD/AF2. Overall, many animal research have examined YK-11. In a 2013 Biological and Pharmaceutical Bulletin study, YK-11 increased muscular mass and strength in mice without harming the liver or other organs