LabwiseFree Androgen Index%
The free androgen index is total testosterone divided by SHBG, a calculated estimate of active testosterone.
Labwise reads the PDF or a photo of your lab report on your iPhone and explains every test like this page does. Nothing leaves your phone.
What Free Androgen Index measures
The free androgen index is total testosterone divided by SHBG, a calculated estimate of active testosterone.
If your Free Androgen Index is low
A free androgen index below the range means less active testosterone, commonly associated with high SHBG or low total testosterone.
Commonly associated with
- High SHBG
- Low total testosterone
- Estrogen-containing medication
If your Free Androgen Index is high
A free androgen index above the range means more active testosterone relative to SHBG, commonly associated in women with polycystic ovary syndrome or low SHBG.
Commonly associated with
- Polycystic ovary syndrome
- Low SHBG
- Insulin resistance
- Testosterone therapy
Typical reference range
| Group | Typical range |
|---|---|
| Women | under 5 % |
| Men | 35 – 150 % |
Typical adult values used by many US labs. Your own report prints the range your lab validated for its method, and that range is the one that counts. Labwise always uses the printed range first.
If it is within range
Your free androgen index is within the range printed by your lab.
Also listed as
FAI, Free Androgen Index (FAI)
Related tests
This page is general information about what a laboratory test measures and what results outside a reference range are commonly associated with. It is not medical advice, does not diagnose any condition and does not replace your clinician. Discuss your results with your healthcare provider.