What is the normal range for a blood thyroid test?

By Forinfos - 08/02/2025 - 0 comments

The normal thyroid stimulating hormone range for a blood thyroid test is 0.4 to 5.5 mU/mL for the normal adult population, states Cleveland Clinic. TSH levels below or above this range may indicate thyroid function issues such as hyperthyroidism or hypothyroidism.

A thyroid test can be completed anytime of day without fasting, says Cleveland Clinic. The brain is responsible for regulating the thyroid hormones present in the blood. If these levels are too low or high, the brain reacts by telling the thyroid to produce more or less hormones. Doctors typically use this test as an indicator for thyroid disease.


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