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← What we test

Thyroid

Free T3

What it is

The active thyroid hormone your cells actually use.

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 T3on 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 T3 trend on a single timeline next to your mind and lifestyle, so you can watch it move as you act.

See your own Free T3.

It's one of 80+ markers in your Baseline — read alongside your mind, by a doctor.

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