Here is another consideration.......There is actually an emerging body of peer-reviewed medical literature that talks about reduced testosterone as a contributor for male mid-life depression and reduced sex drive along with other symptoms. There is an article about it here (www.menshealth.com/cda/article.do?site=M...00013281eac____). This phenomenon has been referred to as male menopause or andropause. Since this is not a widely accepted phenomenon yet the average physician wouldn't screen for it and would probably be skeptical......but hey, until about 15 years ago the medical community thought that the adult brain couldn't create any new brain cells. We now know that the adult brain is definitely capable of creating new brain cells!!!!