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diagnosis

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thyroxine

thyroxine Thyroxine, specifically free thyroxine (FT4) measured in blood, is an important indicator of thyroid function.

Thyroxine, specifically free thyroxine (FT4) measured in blood, is an important indicator of thyroid function. It is made by the thyroid gland and is involved in metabolism, brain and nervous system development, and the regulation of mood and behavior.