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TSH Levels: What High and Low Levels Mean

Normal thyroid-stimulating hormone (TSH) levels generally fall between 0.5 and 5.0 milliunits per liter (mU/L). If your TSH level is higher than 5.0 mU/L it suggests an underactive thyroid, or ...
CMAJ

Levothyroxine prescribing and laboratory test use after a minor change in reference range for thyroid-stimulating hormone

BACKGROUND: Prescribing of levothyroxine and rates of thyroid function testing may be sensitive to minor changes in the upper limit of the reference range for thyroid-stimulating hormone (TSH) that ...