if you dont have problems now, and are planning on calling it quits after this, i would stay away from hrt. that is a life long commitment. honestly, if u plan on quitting working out, y bother juicing? at 40 years old i think recovery is going to be a real issue, wich could lead to hrt. jump on ad50 and your going to get injured. people like traz are used to hitting heavy weights and are conditioned to do so, ur muscle and tendons and everything else are not.