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Free Testosterone
Aka: Free Testosterone, Bioavailable Testosterone, Serum Free Testosterone
- See Also
- Total Testosterone
- Androgen Decline in the Aging Male
- Testicular Failure
- Hypogonadism
- Indications
- Total Testosterone decreased
- Altered sex-hormone binding globulin (SHBG)
- Low SHBG
- Obesity
- Type II Diabetes
- Hypothyroidism
- High SHBG
- Older age patient
- Labs: Normal Levels
- Male: 100 to 680 pg/ml
- Female: 3 to 22 pg/ml
- Labs: Calculation of Testosterone Free Index (TFI)
- TFI = (Total Testosterone / SHBG) x100
- Interpretation
- See Androgen Decline in the Aging Male
- See Testicular Failure