Iodine excess hazard
Iodine deficiency is caused by too low iodine intake, but excess iodine can also affect the health of the body. Iodine intake excessive to people
The health hazards include the following aspects:
1. The effect of high iodine on thyroid function The most common are iodine-induced goiter (IH) and iodine hyperthyroidism.
2. The impact of high iodine on intelligence The relationship between excess iodine and intelligence has only attracted the attention of experts and scholars in recent years. A number of epidemiological surveys conducted in the population have shown that the IQ of students in high-iodine areas is significantly lower than that of the iodized area. Most animal experimental studies have also demonstrated that the excess iodine load can indeed reduce the animal's brain weight and decrease learning and memory, although this effect is not as significant as that of iodine deficiency.
3. Effect of high iodine on sexual function A US study has shown that the intake of iodized salt has a certain relationship with the sperm count of males, suggesting that the consumption of iodized salt by Americans may lead to a decrease in the sperm count of males. In addition, there have been many reports of the effects of excess iodine on the fertility of rats. This cannot but be attributed to the additional concerns raised by excessive iodine supplementation.
Determination of iodide salt
Potassium iodate used for iodized salt
Sampling plus acid and KI solution
KIO3+5KI+3H2SO4=3I2+3H2O+3K2SO4
The amount of intake
Most people are very tolerant of excessive intake of iodine from food. However, it has been reported that overdose can cause thyroid dysfunction, induce hypothyroidism with or without mesenteric enlargement, and the occurrence and variety of thyroid tumors. In 2001, the U.S. Food and Nutrition Association set a cap on iodine intake for children and adults.
salt
Daily intake limit (micrograms)
1~3 200
4~8 300
9~13 600
14~18 900
19~50 1100
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