Because people are generally not short of iodine now, eating seafood and drinking seafood is enough. Eating too much will make you sick, such as thyroid nodules. Non-iodized salt is scarce now, so you must buy it in a drugstore.

Iodization of edible salt can supplement the essential elements of human body and play a role in strengthening the body and preventing and treating diseases. The most applicable, economical and fundamental way to prevent iodine deficiency is to add iodine to salt.

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The iodine content standard of salt stipulated in China is that the iodine content per kilogram of iodized salt is not less than 40 mg when it is processed, not less than 30 mg in sales department and not less than 20 mg in users. Eating this iodized salt can ensure the daily demand for iodine. Prevention practice has proved that iodized salt is the safest and most effective method to prevent iodine deficiency disorders.

Due to the lack of iodine in the earth's environment, human beings need to supplement iodine in a proper amount for a long time, and human beings, regardless of race, nationality, age and sex, must consume a proper amount of salt every day, so salt is the best carrier for iodine supplementation. By eating iodized salt, we can ensure iodine supplementation in daily life.