The thyroid-stimulating hormone (TSH) test measures the amount of TSH in the blood to convey how well a person’s thyroid functions. Normal levels are typically 0.4 to 4.0 milliunits per liter ...

Normal thyroid-stimulating ... as well as test procedures. Most healthcare providers use the TSH test during diagnosis to evaluate thyroid function and determine the optimal course of treatment.

A TSH test measures blood levels of the thyroid stimulating hormone to diagnose ... Interpreting TSH levels Generally, normal TSH levels are between 0.5 to 5.0 mIU/L. However, this may vary ...