ππ€πππ£π Your thyroid uses iodine to make hormones that control metabolism. The first symptom of a deficiency is usually a goiter, a lump in your neck caused by an enlarged thyroid gland. Itβs rare in the U.S., largely because iodine is added to table salt. Other top sources include fish and seaweed. Too much iodine can be harmful though, and supplements interact with some medications.
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