TSH
TSH is the brain’s signal to your thyroid—telling it how hard to work. Higher TSH means your brain is yelling at the thyroid to produce more hormone (often due to sluggish output), while low TSH means your thyroid is either working well or being over-stimulated. TSH is a sensitive marker of thyroid health, but it’s not the full story without Free T4 and Free T3. Even if it’s “normal,” being above 2.5 can reflect early signs of low thyroid function—especially if energy, mood, or metabolism feel off.
- Unit
- µIU/mL
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
1.75µIU/mL
LowOptimal 1.00–2.50High
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.