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What are normal TSH levels?

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Quick Answer

According to WebMD, normal levels of TSH, or thyroid-stimulating hormone, are between 0.4 and 4.2 microunits per milliliter for adults, between 0.7 and 6.4 for children and between 1 and 39 for newborns. Values outside this range may indicate a problem with the thyroid or pituitary gland.

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What are normal TSH levels?
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Full Answer

WebMD further mentions that lower levels than normal may show hypothyroidism, which is an underactive thyroid, and they may indicate a pituitary gland tumor in rare cases. Higher values than normal may be indicative of hyperthyroidism, which is a hyperactive thyroid gland, or they may indicate pituitary gland damage or a first-trimester pregnancy.

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