Testosterone belongs to a class of hormones known as androgens; in-fact this is the primary androgenic hormone. A very powerful hormone in its own right, testosterone is largely responsible for testicular and prostate development, as well as the development of muscle tissue, bone density and strength. Beyond these basic functions, testosterone is by-in-large imperative for our overall general health and well-being; low levels of testosterone can not only negatively affect muscle and bone strength but can negatively affect our state of mind.
While a member of the androgenic class of steroidal hormones, testosterone is also highly anabolic. As both androgenic and anabolic, like all steroidal hormones testosterone is derived from cholesterol and is largely regulated in terms of production by luteinizing hormones (LH) and follicle stimulating hormones (FSH). Being regulated by LH and FSH, in order for these hormones to be released the pituitary gland must first be stimulated in order to achieve this purpose; once achieved and LH and FSH are released, testicular stimulation is achieved thereby causing the production of testosterone. As you can easily see, as important as the testicles are in testosterone production, the pituitary gland is of equal importance; without adequate pituitary function natural testosterone production cannot occur.