Iodine is only harmful if you consume too much. Symptoms of too much iodine can mimic the symptoms of too little iodine, such as an enlarged thyroid gland. The upper limited recommend for an adult is 1,100 mcg. Iodine supplements can interact or interfere with medicines that you take, so you should consult with your primary care provider before taking any type of iodine supplement. It is far better to increase your iodine via natural foods than to use supplements.

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