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Free Testosterone With Total Testosterone LC/MS-MS Test

Sample Report
Specimen Type: Blood


Free Testosterone With Total Testosterone LC/MS-MS Test

The Testosterone Free and Total LC/MS-MS test provides two measurements for Testosterone levels. Results for this test will include Free Testosterone and Total Testosterone measured by liquid chromatography and tandem mass spectrometry (LC/MS-MS). Testosterone is the primary male sex hormone. However, it is present in both men and women. In men, testosterone is produced primarily in the testicles. Small amounts of testosterone are produced by the ovaries in women and the adrenal glands in both sexes.

The majority of testosterone is bound to the proteins Sex Hormone-Binding Globulin and Albumin. The portion of testosterone which is not bound is known as Free Testosterone. Free Testosterone is available for the body to use. Measuring free testosterone can be helpful for people who have irregular levels of hormone binding proteins or have conditions such as obesity, cirrhosis and thyroid disorders which can affect protein levels.

Certain groups of people such as women, children and men whose bodies do not produce enough testosterone (hypogonadism) may find that a standard testosterone blood test is not sensitive enough to provide them with accurate results. In these cases, a Testosterone LC/MS-MS test may be more appropriate. This test is more sensitive and provides a more accurate measurement when testosterone concentrations are very low.

This test is typically ordered to monitor testosterone levels in men who have been diagnosed with hypogonadism or are showing symptoms such as infertility, erectile dysfunction, decrease in muscle mass, lack of facial or body hair growth, osteoporosis, decreased sex drive, fatigue, or delayed puberty. This test is also ordered for women who are showing symptoms of abnormal testosterone levels such as abnormal facial or body hair growth, thinning hair, acne, abnormal menstrual periods, infertility, low sex drive, osteoporosis, fatigue and depression.

Turnaround for this test is typically 3-5 business days.

Note: Result turn around times are an estimate and are not guaranteed. Our reference lab may need additional time due to weather, holidays, confirmation/repeat testing, or equipment maintenance.


This testosterone test has no special requirements



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