Free Androgen Index (FAI)

Ratio of testosterone to SHBG

2/22Providers
Additional SpecCategory
Men:14.8-94.8, WomeReference

Limited Availability

2 providers include this

Category

Additional Specialized Tests

Reference Range

Men:14.8-94.8, Women:0.8-11.0

What is Free Androgen Index (FAI)?

Ratio of testosterone to SHBG

Why It Matters

Indicates bioavailable testosterone. Useful in women with PCOS or hirsutism. Better reflects androgen status than total testosterone alone.

Reference Range: Men:14.8-94.8, Women:0.8-11.0

Which Providers Test Free Androgen Index (FAI)?

Full Provider Comparison

ProviderIncludesAnnual CostBiomarkers
SuperpowerSuperpower$199100+ (150 with ratios)
WHOOP Advanced LabsWHOOP Advanced Labs$34965
Labcorp OnDemandLabcorp OnDemand$39830+
Life ExtensionLife Extension$48640+
EverlywellEverlywell$46883
Mito HealthMito Health$349100+
InsideTrackerInsideTracker$68054
Function HealthFunction Health$365100+
Marek Health BaseMarek Health Base$25065
Marek Health ComprehensiveMarek Health Comprehensive$49570+
Marek Health CompleteMarek Health Complete$895100+
Marek Health ExecutiveMarek Health Executive$1950150+
BlueprintBlueprint$399100+
Quest HealthQuest Health$Varies75+
Empirical HealthEmpirical Health$190100+
Oura Health PanelsOura Health Panels$9950
SiPhox HealthSiPhox Health$12560
Hims Labs BaseHims Labs Base$19950
Hims Labs AdvancedHims Labs Advanced$499120+
HealthspanHealthspan$418880+
Vitality Blueprint StandardVitality Blueprint Standard$37585
Vitality Blueprint EliteVitality Blueprint Elite$700129

Ready to Test Free Androgen Index (FAI)?

2 providers include this biomarker in their panels

Frequently Asked Questions

What does Free Androgen Index (FAI) test for?
Free Androgen Index (FAI) is a additional specialized tests biomarker. Ratio of testosterone to SHBG The normal reference range is Men:14.8-94.8, Women:0.8-11.0.
Which providers include Free Androgen Index (FAI)?
2 of 22 providers include this test:Superpower, SiPhox Health.
How often should I test Free Androgen Index (FAI)?
For most people, testing 2-4 times per year is recommended to establish baseline levels and track trends. Consult your healthcare provider for personalized recommendations.
What is the optimal range?
The standard reference range is Men:14.8-94.8, Women:0.8-11.0. Many functional medicine practitioners recommend tighter optimal ranges for peak health. Your ideal range may vary based on age, sex, and health goals.
Why is Free Androgen Index (FAI) important?
Indicates bioavailable testosterone. Useful in women with PCOS or hirsutism. Better reflects androgen status than total testosterone alone.

Medical Disclaimer

This information is for educational purposes only and is not medical advice. Always consult with a qualified healthcare provider about your specific health needs.