What is a normal TSH level?

The normal range for thyroid-stimulating hormone (TSH) typically falls between 0.4 and 4.0 milliunits per liter (mU/L). However, it's important to note that the reference range may vary slightly depending on the laboratory and the specific assay used for testing. TSH levels outside this range may indicate an underlying thyroid dysfunction and require further evaluation. It is best to consult with a healthcare professional for an accurate interpretation of TSH levels.