Denmark watches iodization level to keep population in proper intake range |
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You CAN get too much of a good thing. Denmark is the latest to note that adoption of iodized salt can put iodine sufficient citizens about the healthy maximum threshold, according to Reuters News Service.
Of nearly 5.3 million Danes, 4,281 started using antithyroid medication in 1997. The researchers tallied antithyroid medication use again after the program began voluntarily in 1998, and became mandatory in 2000.
In the region of the country with moderate iodine deficiency, the number of antithyroid medication users increased 46 percent during the 4 years after fortification. This was most common among residents younger than 40 years and older than 75 years.
By contrast, in the mildly-deficient region of Denmark, antithyroid use increased by just 18 percent during the first 4 years, and only among residents 59 years of age and younger.
After 6 years of iodine fortification, the rates of antithyroid use began to decline to the level they were prior to the start of fortification.
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