A 45-year-old female asked:
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was diagnosed - mild hashimotos & reverse t3 (liothyronine) is elevated (tsh, t3 (liothyronine), t4 normal-tsh borderline sometimes). what is & what does elevated reverse t3 (liothyronine) mean?

1 doctor answer
Dr. Robert Lang
51 years experience Endocrinology
Not much: The best test for hypothyroidism is the TSH. TSH is a much larger hormone that T3 (liothyronine) or T4 so it is easier to measure accurately. It is so sensitive that it is reported by the lab on a logarithmic scale. That means it is 10 times more sensitive than the T4 or T3 (liothyronine). Because it is so sensitive, many people will have symptoms even when the TSH if in the 'normal' range. Reverse T3 (liothyronine) can go up with illness.
Answered on Nov 20, 2014
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