Most salt sold in the United States is iodized salt; that is,a small amount is Na⁺ rather than NaCl.One benefit of this is a reduction in the number of goiters.

Question

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Iodized salt contains a small amount of sodium iodide (NaI) or potassium iodide (KI) in addition to sodium chloride (NaCl), which helps in reducing the number of goiters as iodine is necessary for thyroid hormone production.

Most Salt Sold in the United States Is Iodized Salt;