Abstract
Summary
Sodium-levo-thyroxine in dosage of 0.075 mg, orally, usually reduced radioactive iodine uptake by the thyroid of normal human subjects; this was associated with a rise of protein bound iodine when a dosage of 0.2 mg or more was given. Tri-iodo-thyronine in dosage as low as 0.008 mg orally also reduces the uptake. This is associated with a decrease in serum protein bound iodine.
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