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What is a Normal TSH?

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Updated July 01, 2014

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What the American Association of Clinical Endocrinologists Said...
What is a Normal TSH?
Here is an excerpt from a January 2003 AACE press release:

"Until November 2002, doctors had relied on a normal TSH level ranging from 0.5 to 5.0 to diagnose and treat patients with a thyroid disorder who tested outside the boundaries of that range. Now AACE encourages doctors to consider treatment for patients who test outside the boundaries of a narrower margin based on a target TSH level of 0.3 to 3.0. AACE believes the new range will result in proper diagnosis for millions of Americans who suffer from a mild thyroid disorder, but have gone untreated until now."

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