Complete Testing & Optimization Guide
Optimal ranges, provider comparison, and strategies to improve your Free Androgen Index (FAI) levels
Only 1 providers include this test
Additional Specialized Tests
Men:14.8-94.8, Women:0.8-11.0
Abnormal Free Androgen Index (FAI) levels can indicate underlying health issues that may go undetected without proper testing. Regular monitoring helps catch problems early when they're most treatable.
Understanding your Free Androgen Index (FAI) levels enables targeted interventions, tracks treatment effectiveness, and helps optimize your overall health and performance.
Ratio of testosterone to SHBG
Indicates bioavailable testosterone. Useful in women with PCOS or hirsutism. Better reflects androgen status than total testosterone alone.
Men:14.8-94.8, Women:0.8-11.0
| Provider | Includes Test | Annual Cost | Total Biomarkers |
|---|---|---|---|
 Superpower | ✓ | $199 | 100+ |
 WHOOP Advanced Labs | — | $349 | 65 |
 Labcorp OnDemand | — | $398 | 30+ |
| — | $486 | 40+ | |
| — | $468 | 83 | |
| — | $798 | 100+ | |
 InsideTracker | — | $680 | 48 |
 Function Health | — | $499 | 100+ |
| — | $900 | 70+ | |
| — | $1150 | 110 | |
| — | $Varies | 75+ |
Choose from 1 providers that include this biomarker in their panels
Free Androgen Index (FAI) is a additional specialized tests biomarker that Ratio of testosterone to SHBG The normal reference range is Men:14.8-94.8, Women:0.8-11.0. Regular testing helps track changes and identify potential health issues early.
1 out of 10 major blood testing providers include Free Androgen Index (FAI) in their standard panels. These include Superpower.
For most people, testing Free Androgen Index (FAI) 2-4 times per year is recommended to establish baseline levels and track trends. If you have abnormal results or are actively working to optimize this biomarker, more frequent testing (quarterly) may be beneficial. Always consult with your healthcare provider for personalized testing frequency recommendations.
The standard laboratory reference range for Free Androgen Index (FAI) is Men:14.8-94.8, Women:0.8-11.0. However, many functional medicine practitioners recommend tighter "optimal" ranges for peak health and performance. Your ideal range may vary based on your age, sex, health goals, and other individual factors. Work with a healthcare provider familiar with optimal ranges to determine your target levels.
Most direct-to-consumer blood testing services that include Free Androgen Index (FAI) provide the physician order as part of their service. However, some states have restrictions on direct-to-consumer testing. Check with your chosen provider about availability in your state and whether they provide the necessary physician authorization.
Indicates bioavailable testosterone. Useful in women with PCOS or hirsutism. Better reflects androgen status than total testosterone alone.
This information is for educational purposes only and is not medical advice. Always consult with a qualified healthcare provider about your specific health needs and before making decisions about blood testing.
