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Volume 355:1500-1501 October 5, 2006 Number 14
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Iodine Nutrition — More Is Better

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by Utiger, R. D.
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To the Editor: The editorial by Utiger (June 29 issue)1 summarizes the effects of iodine deficiency. However, his recommendation of an iodine intake of 300 to 400 µg per day far exceeds the following recommendations of the Institute of Medicine: 150 µg per day for nonpregnant adults, 220 µg per day for pregnant women, and 290 µg per day during lactation.2 Teng et al.3 found that an iodine intake of approximately 320 to 840 µg per day resulted in an increased incidence of subclinical hypothyroidism and thyroid autoimmunity. These risks may be clinically important — children of women with subclinical . . . [Full Text of this Article]



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