if you supplement iodine, the amount in iodized salt is probably enough. a lot more is questionable, and it's very easy to take an excessive dose with iodine supplements. the main purpose of iodine is for the body to turn it into thyroid hormones. it's worth reading about thyroid hormones themselves if you're interested in iodine.  thyroid: therapies, confusion, and fraud   es/thyroid.shtml
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