What is a normal thyroid reading?
T3 Test -The range for normal values is 100 to 200 ng/dL (nanograms per deciliter). T4 Test- A typical normal range is 4.5 to 11.2 micrograms per deciliter (mcg/dL). TSH- Normal values are from 0.4 to 4.0 mIU/L for those with no symptoms of abnormal thyroid function. However, those without signs or symptoms of an underactive thyroid who have a TSH value over 2.0 mIU/L but normal T4 levels may develop hypothyroidism sometime in the future. This is called subclinical hypothyroidism (mildly underactive thyroid) or early-stage hypothyroidism. Anyone with a TSH value above this level should be followed very closely by a doctor. If you are being treated for a thyroid disorder, your TSH level should be between 0.5 and 2.0 mIU/L.
