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A member asked:
What blood markers are indicative of a hyperactive thyroid?
2 doctors weighed in across 2 answers
High thyroxine: A significantly elevated free T4 and a low TSH would be the most common blood tests indicative of hyperthyroidism.
Answered 1/15/2015
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Low TSH: The most sensitive test for determining thyroid levels is the TSH level. Low levels imply that the thyroid function is high, whereas high TSH implies that the thyroid function is low. The thyroid levels (t4, t3) should be measured if the TSH is abnormal.
Answered 6/10/2014
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