Testosterone is commonly referred to as a male hormone. It is associated with men's physical traits, mood patterns, and sex drive. But, if you think that only men need testosterone, you should think again. This is not just a word that can be seen on a cover of a "Men's Health". Trace amounts are found in a woman's ovaries and adrenal glands. Testosterone can make an impact on a woman's lifestyle, because it is one of the necessary ingredients in the hormonal cocktail that affects health, libido, mood, and energy levels.