Free Androgen Index
Also known as: FAI
Not near Sutton Coldfield? Have this blood test anywhere in the UK
We offer blood tests across the UK through our partner network: have your sample taken at The Vesey or at a partner clinic near you, anywhere in the UK and Ireland. A Health Advisor books it for you on a free 15-minute call, and your results come back to The Vesey for our GPs to review.
The free androgen index is a calculated value that estimates the proportion of testosterone not bound to carrier proteins. At The Vesey in Sutton Coldfield, Free Androgen Index is available within 11 private blood test panels, with clinician-reviewed results. This page is educational and does not replace personalised medical advice.
What Free Androgen Index measures
The free androgen index is a calculated value that estimates the proportion of testosterone not bound to carrier proteins. It combines total testosterone with SHBG to indicate the more readily available hormone.
Why it is tested
It is used alongside total testosterone and SHBG to give a fuller picture of androgen status. Several hormone-focused panels report it automatically.
Tests that include Free Androgen Index at The Vesey
Guide prices are read from the current Vesey catalogue and confirmed at booking.
Testosterone Monitoring
Guide price from £148
Hormone Profile
Guide price from £156
Fertility
Guide price from £210
Fertility + STI
Guide price from £220
Standard Screen Plus Hormonal Health (Female)
Guide price from £233
Standard Screen Plus Hormonal Health (Male)
Guide price from £233
5 further Vesey panels include Free Androgen Index. See all blood test panels →
Related biomarkers
Other markers in the hormones group:
Frequently asked questions
How is the free androgen index worked out?
It is calculated from total testosterone and sex hormone binding globulin (SHBG), rather than measured directly. This is why those markers are usually reported together.
This page is for general education and information only. It is not medical advice, a diagnosis, or a recommendation for any specific test or treatment, and it does not include reference ranges, which are laboratory-dependent and interpreted by a clinician. Guide prices are indicative and confirmed at the time of booking. Always discuss your health and any test results with a qualified clinician. In an emergency call 999; for urgent non-emergency advice call NHS 111.
Private blood testing in Sutton Coldfield
Clinician-reviewed results. No GP referral needed.
Not sure which blood test to book?
Book a free 15-minute video call with one of our Health Advisors. We talk through your symptoms or goals, recommend the right test and book it for you. No charge, no obligation.
Not near Sutton Coldfield? We offer blood tests across the UK through our partner network. This call is how a partner clinic appointment is booked: we complete the paperwork and arrange it for you, anywhere in the UK and Ireland.
Book a free discovery call or call 0121 387 3705