Low Testosterone Symptoms in Men Over 40 and 50!
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There is protein familiar called SHBG (sex hormone binding globulin) that often associated with testosterone. This protein is crucial to bond testosterone in the blood, and most of male hormone testosterone is bound by SHBG. So there is also a few amount of testosterone that is free or ‘not-bound’. If a man or woman have a sexual problem, sometime doctor may need to check the level of this free testosterone in order to help determine the underline problem.
Below is a helpful table (source: WebMD) about the normal range of free testosterone:
Furthermore, to control and maintain the level of testosterone, the body needs to produce another hormone called ‘LH’ or luteinizing hormone. It is produced by pituitary gland. If there is less amount of testosterone in the body, the pituitary gland then will produce luteinizing hormone to tell the testicles to create more testosterone.
So, for abnormal declining testosterone, doctor usually also often check the performance of the pituitary gland (particularly if the previous tests found that there is no problem with testicles (in men) and ovaries (in women)).