Thyroid
Free T4
What it is
The storage form of thyroid hormone, converted to T3 as needed.
Why we read it with your mind
No marker lives in isolation. Stress, sleep and mood shift your biology in measurable ways, and your biology shifts them right back. That's why Aha never reads Free T4on its own — we read it alongside a clinical mental-health screen, so a number that looks “fine” in a vacuum is understood in the context of the whole person it belongs to.
How Aha tracks it
It's drawn at home, processed at an NABL-accredited lab, and reviewed by a registered physician — then explained to you in plain language by a human concierge. Re-screen over time and you'll see Free T4 trend on a single timeline next to your mind and lifestyle, so you can watch it move as you act.
More in Thyroid
See your own Free T4.
It's one of 80+ markers in your Baseline — read alongside your mind, by a doctor.
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