Hormones
What is Testosterone to SHBG ratio (display); Testosterone to SHBG ratio (free androgen index) (clinical)?
your effective androgen level
- Sample
- Serum
- Fasting
- No fasting needed
- Turnaround
- 2 days
The ratio of total testosterone to SHBG gives an estimated free, biologically active testosterone level.
The ratio is calculated and used to support evaluation of androgen deficiency or excess.
What does low Testosterone to SHBG ratio (display); Testosterone to SHBG ratio (free androgen index) (clinical) mean?
A low ratio suggests functional androgen deficiency.
What does high Testosterone to SHBG ratio (display); Testosterone to SHBG ratio (free androgen index) (clinical) mean?
A high ratio suggests androgen excess, which in women can be consistent with PCOS.
Panels that measure Testosterone to SHBG ratio (display); Testosterone to SHBG ratio (free androgen index) (clinical)
- Male Hormone Test Base
- Male Hormone Test Plus
- Male Hormone Test Complete
- Health Check Man
Reading
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This is general information about the marker, not an assessment of your values and not medical advice. Last updated: August 2026.