Over 99 percent of the circulating thyroid hormone is bound to plasma proteins.

Name: Over 99 percent of the circulating thyroid hormone is bound to plasma proteins.
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Question

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The majority of thyroid hormone in the bloodstream is bound to plasma proteins, mainly thyroxine-binding globulin (TBG), but also albumin and transthyretin. Less than 1 percent of circulating thyroid hormone is unbound and able to enter tissues and exert its effects.

Over 99 Percent of the Circulating Thyroid Hormone Is Bound