This venous blood test checks your levels of the hormone Testosterone. Testosterone is the main sex hormone in males. The high levels of Testosterone that men have compared to women are responsible for the development of virtually all the physical differences between the sexes. In adult males it controls sex drive, maintains muscle mass and helps make sperm.
Understanding your Testosterone levels may help if you are experiencing low sex drive, infertility, erectile dysfunction and more. Testosterone levels should also be checked regularly by anyone using testosterone supplements for any reason.