Martina is being treated for hypothyroidism with a synthetic T4 replacement. What is the advantage of this approach?
A) It blocks the enzymes responsible for metabolizing thyroid hormones.
B) It slows the excretion of bioactive thyroid hormone.
C) It helps the body make T3, the bioactive form of thyroid hormone.
D) It substitutes for the bioactive hormone the body is not making.
C
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