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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?

2 doctors weighed in
Dr. Robert Lang
Internal Medicine - Endocrinology
1 doctor agrees

In brief: 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.

In brief: 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.
Dr. Robert Lang
Dr. Robert Lang
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