In 2006, "New England Journal of Medicine," published a study done by China Medical University, the result is an excessive amount of iodine and excess of iodine can cause thyroid functional disorder and the incidence of autoimmune thyroiditis increased. In this paper, the "excessive" urine iodine actually much lower than the United mens supra States to develop the maximum intake.
The publication is very authoritative, it played a major concern for this paper. Over the same period has also made a comment on the publication, entitled "Iodine Nutrition – the better." Author believes that because of the promotion of iodized salt, the United States has a very low incidence of iodine deficiency disorders – but the U.S. is not a mandatory iodization, iodized salt on the market accounted for about 70%. As the last two or three decades down the public's consumption of salt, but processed foods generally do not use iodized salt, which makes the U.S. population median urinary iodine during this period dropped from 320 to supra shoes 200 below. Meanwhile, the U.S. public, the incidence of iodine deficiency disorders from 3% to 12%. More seriously, the incidence of iodine deficiency in pregnant women from 1% to 7%. If the indicators according to WHO, the U.S. population between urinary iodine levels between 100 and 200 is very reasonable value. While China's more than 200, some higher. But the comment author believes that the current U.S. population between iodine intake between the shortage and barely enough, it should be increased to 300 to 400 micrograms per day amount. Of this amount is much higher than WHO recommended value, the author and other supra shoes scholars also later on a further debate.
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