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Iodine is a mineral found in iodized salt, seafood, eggs, milk and some types of bread. Iodine is used by the thyroid gland to help regulate metabolism and development, especially in infants and children.
Case is the case is iodine deficiency, especially in children and pregnant women. But it turned out to be a case of excess iodine is also a lot going on and often ignored.
Just how the consumption of iodine is ideal?
In general, the researchers said that the iodine intake depends on each person and place to stay. In areas that have low soil iodine, and people who eat mainly local foods need more iodine.
In the US, adults are advised to get 150 micrograms of iodine per day, pregnant women should get 220 micrograms, while breastfeeding women should get 290 micrograms.
While the high safety limit that can be tolerated according to the National Institutes of Health in adults is 1,100 micrograms of iodine per day. However, most Americans will get more than 800 micrograms of iodine per day through diet.
American Thyroid Association recommends that pregnant and nursing women should consume vitamin with iodine due to iodine deficiency may increase the risk of miscarriage and thyroid problems in women, in addition to mental disabilities in babies.
While in China the average person consume 400 micrograms of iodine supplements. The results of the study in China showed that there are about 800 micrograms of iodine per day when diet factors enter. The results showed that, at least people in China should get no more than 800 micrograms per day.
Meanwhile, according to Dr. Elizabeth Pearce, professor of medicine at Boston University for the US population should not take iodine supplements with more than 150 micrograms in a daily dose.
"And most Americans could skip iodine supplements at all. Overall, the amount
of iodine intake in the American enough. But there are certain people who may need supplements, including pregnant women," said Pearce as reported by HealthNews.
Effects of the excess and deficiency of iodine
A new study has examined the amount of excess iodine intake. Excessive iodine in the diet can cause subclinical hypothyroidism, which has been linked to heart disease.
All this time the focus of iodine deficiency is a major health problem throughout the world, but the new study focused on the potential loss of excess iodine.
If iodine deficiency during fetal development and early childhood is a major cause of brain disorders in most countries but little is known about the number of iodine intake can be defined as the excess iodine.
The Chinese researchers randomly observed in healthy adults to take various doses of iodine supplements for four weeks. The researchers found that, at relatively higher doses of 400 micrograms a day, the study participants began to develop a condition known as subclinical hypothyroidism.
Results of the new study published in the American Journal of Clinical Nutrition. A condition with no obvious symptoms of hypothyroidism, usually include issues such as fatigue, depression, dry skin and weight gain.
In the study, the study participants taking 400 micrograms of iodine supplements. The study participants get about 800 micrograms of iodine per day when diet factors enter. The results showed that, at least should get no more than 800 micrograms per day. The study was led by Zhang of Tianjin Medical University Wanqi.
Subclinical hypothyroidism has no obvious symptoms, but studies have linked the condition with increased long-term risk of heart disease.
The study does not prove that subclinical hypothyroidism is caused by excessive intake of iodine. However, researchers fear that perhaps it will have an impact on health.
But in general, the researchers think that the effect of excess iodine may depend on each person and place to stay. In areas that have low soil iodine, and people who eat mainly local foods would have a high risk of iodine deficiency.
"It is unclear whether the adults in the study had sufficient iodine intake early in life. If not, it can be a factor in their response to iodine supplements," said Pearce.
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