Hormones & Performance·Best seller
Amenorrhea Profile
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Hormones & Performance
% Free Testosterone
This ratio tells you how much of your total testosterone is free and bioavailable—meaning not bound to SHBG or albumin, and actually able to interact with androgen receptors. You can have “normal” total testosterone but still feel off if your free fraction is low. This metric helps spot high SHBG, poor hormone bioavailability, or androgen resistance, and is key for assessing true hormonal function.
Immunoassay or LC/MS? How testosterone tests differ, and why the 1,500 cap matters
- Unit
- %
- Health impacts
- Mood · Energy · Libido
In your dashboard
Your trend, against your optimal range.
Example data · how your trend would appear once you test
At every level
What we'd do at any value.
Exploring
3.00%
LowOptimal 2.00–4.00High
In your optimal zone
Habits that hold this position.
No specific guidance for this zone yet. We're working on it and will update this soon.
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