Selenium is found in Brazil nuts, and it is important in the production of testosterone. If you are showing any signs of low testosterone, try eating three or four raw Brazil nuts each day. Some suggest a person should not eat too many Brazil nuts.
(Of course, I am not mentioning this because I had the problem. I am speaking for a friend. Uh huh. Yeah, that is it. Wink, wink.) Anyway, my "friend" began to notice improvements within a week. You can get Brazil nuts in bulk at many grocery stores, and they may be a simple and inexpensive aid to low testosterone problems.
Other things that help low testosterone problems are reducing body weight by ten percent and regular exercise.