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Iodization is the process of adding iodine to salt to prevent iodine deficiency. Iodine is an essential nutrient that is required for the production of thyroid hormones. Thyroid hormones are responsible for a variety of bodily functions, including metabolism, growth, and development. Iodine deficiency can lead to a variety of health problems, including goiter, hypothyroidism, and cretinism. Iodization of salt is a simple and effective way to prevent iodine deficiency. Iodized salt is typically made by adding potassium iodide or sodium iodide to regular salt. The amount of iodine added to salt is typically 50-100 parts per million. Iodized salt is safe and effective for use by people of all ages.