Testosterone is the most well-known male hormone. Testosterone is in charge of the activity of male sex organs, greater muscles and deep voice. It is also responsible for hair on man's body Testosterone is secreted in testes. The function of testosterone is linked to well-being of a man.

Most men have never given any thought to whether or not mens vitamins actually differ. Do men have really different vitamin needs than women? Are those special mens vitamins really worth $7 more than the plain 'unisex' version?