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Testosterone Free

A free testosterone test is a blood test that measures the level of testosterone that is not bound to proteins in the blood, known as free testosterone. Testosterone is a male sex hormone that is produced in the testicles in men and in smaller amounts in the ovaries and adrenal glands in women. Free testosterone is the active form of testosterone that is available to be used by the body. Most of the testosterone in the blood is bound to proteins, such as sex hormone-binding globulin (SHBG), and is not available to be used by the body. Therefore, measuring free testosterone levels can provide a more accurate picture of a person's testosterone status. The free testosterone test is typically used to evaluate and diagnose conditions related to low testosterone levels, such as hypogonadism, a condition in which the body does not produce enough testosterone. Symptoms of low testosterone levels in men can include decreased sex drive, erectile dysfunction, fatigue, and loss of muscle mass. In women, low testosterone levels can cause decreased sex drive, fatigue, and loss of bone mass.

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