Iodine supplements work by providing the body with iodine, which is an essential trace element. Iodine is required for the proper function of the thyroid gland. The thyroid gland produces hormones that are essential for regulating metabolism. Iodine deficiency can lead to goitre, which is an enlargement of the thyroid gland. Iodine deficiency can also cause mental retardation and other developmental issues.
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