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What is a Normal TSH?

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Updated April 11, 2014

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The "New" Normal Range
What is a Normal TSH?
Since late 2002, however, the American Association of Clinical Endocrinologists (AACE) and other professional groups have recommended a narrower range of .3 to 3.0. This means that hyperthyroidism is suspected at TSH levels below .3, and 3.0 and above may be considered diagnostic of hypothyroidism.

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