Testosterone replacement Therapy is a hormone treatment which is done for the men who have low level of testosterone hormone in blood. the low testosterone or low t occur with aging and lower the sex drive and other problems. Read full story about Testosterone replacement Therapy and side effects from this post - http://www.sciencemirror.com/2015/11/testosterone-replacement-therapy-and-side-effects.html Visit Science Mirror and Read latest science articles. there are several causes of low testosterone all are described in this slide. Specially old people like to have Testosterone replacement Therapy. The above article have latest research about this therapy and side effects. http://www.sciencemirror.com/2015/11/testosterone-replacement-therapy-and-side-effects.html www.sciencemirror.com