A calculated relationship between total and free testosterone.
What it is
Labs may report free/total testosterone ratios derived from measured or calculated free testosterone.
Why it matters
Helps describe binding patterns with SHBG; not a stand-alone diagnosis.
This guide is educational only and cannot diagnose you. Discuss results, especially anything outside your laboratory’s reference interval, or that does not match how you feel, with a GP or other appropriately qualified clinician.
How it affects the body
Binding proteins change how much androgen is available to tissues.
For athletes
Interpret with total testosterone, SHBG, and symptoms, especially under high training load.
Related tests
Panels that include Testosterone to free testosterone ratio.
