The phenomenon of the biological clock isn’t exclusive to women, it seems men also are prone to age-related changes in hormone levels, sexual function, physical features, and quality of life. These changes, dubbed "andropause" (and sometimes "male menopause") are due to a progressive decrease in testosterone production. As men near middle age, the process speeds up and so may the frequency and effect of the symptoms. Common symptoms include fatigue, reduced muscle mass, erectile dysfunction, loss of libido, and even depression. (more…)