How is Testosterone Deficiency Diagnosed?
Diagnosing testosterone deficiency involves a comprehensive approach, starting with a detailed medical history and physical examination. Physicians often assess symptoms associated with low testosterone levels, such as fatigue, reduced libido, depression, and difficulty concentrating.
Following the initial evaluation, blood tests are essential to confirm the diagnosis. The most accurate measurement of testosterone is typically obtained through a serum testosterone test, which is preferably conducted in the morning when testosterone levels are at their peak.
A total testosterone level below 300 ng/dL (nanograms per deciliter) is generally considered indicative of deficiency. In some cases, additional tests may be performed to measure free testosterone, which is the biologically active form, as well as levels of luteinizing hormone (LH) and follicle-stimulating hormone (FSH) to identify whether the cause is primary or secondary hypogonadism.
It is important to note that a single low testosterone reading does not confirm a deficiency. Physicians often require a confirmatory test on a separate day to ensure accurate diagnosis. If testosterone deficiency is diagnosed, the potential benefits and risks of treatment options should be discussed thoroughly with the patient.