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Free Testosterone

Sex HormonesHormonal BalanceBlood

A testosterone blood test can report total testosterone, which measures both free and attached testosterone, or free testosterone, which shows the free portion only. Free testosterone is easier for the body to use.

Why it matters: Abnormal testosterone levels can point to several different health issues, and a free testosterone result may be more helpful for diagnosing certain conditions.

Source · Cleveland Clinic — what it is, why it matters, related conditions

Reference Range
0.05 – 0.21ng/mL
0.05
0.21LowNormalHigh
Associated Conditions
Primary hypogonadism, which low levels could point to in malesSecondary hypogonadism, which low levels could point to in malesA tumour in the adrenal glands or testicles, which high levels could indicatePolyendocrine metabolic ovarian syndrome, which high levels could point to in femalesCongenital adrenal hyperplasia, which high levels could point to in femalesOvarian cancer, which high levels could point to in femalesAdrenal tumours, which high levels could point to in femalesCushing disease, which high levels could point to in females
Related Markers
Testosterone (Total)SHBGLHFSH
Common questions

What is Free Testosterone?

A testosterone blood test can report total testosterone, which measures both free and attached testosterone, or free testosterone, which shows the free portion only. Free testosterone is easier for the body to use.

What might a high or low Free Testosterone mean?

Abnormal testosterone levels can point to several different health issues, and a free testosterone result may be more helpful for diagnosing certain conditions.

What is the typical reference range for Free Testosterone?

The general-population reference range shown here is 0.05 – 0.21 ng/mL. Reference ranges describe the general population and are not a personal target — discuss your results with your physician.

More in Sex Hormones
EstradiolFSHLHProgesteroneProlactinSHBGTestosterone (Total)

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