Why do docs recommend testosterone supplementation for men?

Helps balance estrog: Testosterone supplements helps balance estrogen excess if there is body weight issue. Testosterone levels usually decline in male after 40 yrs of age.

3 Good Reasons: 1) low testosterone increases mortality: http://archinte.Jamanetwork.Com/article.Aspx?Articleid=410768 2) endogenous testosterone concentrations at baseline were inversely related to mortality due to all causes: http://circ.Ahajournals.Org/content/116/23/2694.Short 3) increased risk of all-cause mortality: http://eurheartj.Oxfordjournals.Org/content/31/12/1494.Short.