Excess Iodine in Kids causes Goiters

Excess Iodine in Kids causes Goiters

Excess Iodine in Kids causes Goiters

Excess Iodine in Kids causes Goiters

High thyroid volume in children with excess dietary iodine intakes Zimmermann et al in  J Clin. Nutrition

The United States and central and coastal Hokkaido; had  excessive iodine intake.

Our data support previous findings of thyroid sensitivity to

high iodine intakes and suggest that chronic iodine intakes 500

g/d in children increase thyroid size. However, this possibility
is based mainly on the data from coastal Hokkaido; in central
Hokkaido and in the United States—the 2 other sites with a high
prevalence of UI concentrations 500 g/L—there was no sig-
nificant increase in Tvol at higher UI concentrations.This dif-
ference could be due to dietary or environmental factors (or both)
in coastal Hokkaido that potentiate the effects of high iodine
intake. A limitation of our study was that thyroid function tests
and antithyroid antibodies were not measured in the sample. It is
possible that children with high iodine intakes could have subtle
changes in pituitary-thyroid function that were not reflected by
increases in thyroid size. However, in previous studies of iodine
excess in adults and children that measured Tvol by ultrasound
(most of which reported iodine intakes much higher than those in
our sample), nearly all detected an increase in Tvol (5, 7, 8,
28–31). This suggests that an increased Tvol is a reasonable
marker of thyroid dysfunction in response to iodine excess. Al-
though our findings support the contention that moderately high
dietary intakes of iodine —in the range of 300–500 g/d—are
well tolerated by healthy children, iodine intakes in this range are
of no benefit and may have adverse effects not detected in this
study.
Comments:
Autoimmune thyroiditis is effected by high iodine intake. The USA has a big thyroid supplement industry pushing thyroid support products with iodine seaweed, kelp and even thyroid hormones. Parents are not doing their children in having them follow their parents in taking supplements with iodine. USA on a normal diet does not have iodine deficiency. 150-300 mcgs a day is not excessive but supplements can push the amount to over 500 mcgs/day.
No Supplements are needed to supply  iodine to kids.
Richard Guttler MD,FACE,ECNU
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