TopicsHormones and women's health
TSH below 2
For optimal thyroid function
Most of the experts we follow recommend it.
Aim to maintain TSH levels under 2 to better detect thyroid dysfunction and reduce inflammation risks.
Who is behind it
Voices including a licensed practitioner, an endocrinology-trained performance coach and a licensed naturopathic doctor.
How strong the research is
Mostly expert experience so far, with published research still catching up.
In their words
“A thyroid stimulating hormone level over 2.5 is not optimal and is not normal despite what your primary care or endocrinologist is telling you.”
a licensed practitioner
TSH levels over 2.5 are not optimal and may indicate thyroid dysfunction despite conventional normal ranges
TSH tests for depression, infertility, or pregnancy should be lower for accurate diagnosis
Different labs use different platforms which can cause significant variation in TSH results, so knowing the platform helps interpret results accurately
Talk it through
Entrain shows what the experts teach, so you can make better decisions with your own clinician. It does not diagnose or prescribe. If something is worrying you, start there.
How this reading was made
Every line here comes from a doctor, scientist or coach speaking publicly, and links to the moment they said it. Entrain listens for where independent experts arrive at the same place on their own, and shows where they part ways. Mostly expert experience so far, with published research still catching up.
None of the statements here come with a declared commercial interest. Last refreshed 23 September 2026.
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