Iodine is an essential element of human nutrition, and its impact on human intelligence is very direct and has a significant effect. In daily life, absorb iodine element mainly by eating iodized salt, in addition also from food.

1, seafood

Marine life is very high in iodine. The highest iodine-containing foods are seafood, such as kelp, seaweed, fresh scallops, dried arkshells, dried clams, dried scallops, tamarind, sea cucumbers, jellyfish, lobsters and so on. Kelp has the highest iodine content, reaching more than 240 mg/kg in dried kelp; followed by sea shellfish and fresh sea fish reaching about 800 micrograms/kg. However, the salt contains very little iodine, the more refined salt contains less iodine, sea salt contains about 20 micrograms of iodine / kg.

2, terrestrial food

Terrestrial food to eggs, milk iodine content is the highest to 40 micrograms / kg ~ 90 micrograms / kg, followed by meat, freshwater fish iodine content is lower than meat, plant iodine content is the lowest, especially fruits and vegetables.

80%-90% of the body's iodine comes from food, 10%-20% is obtained through drinking water, and 5% of iodine comes from the air. Iodide in food is reduced to iodide ions before it can be absorbed, and iodine bound to amino acids can be absorbed directly.

3, iodine-rich foods are: kelp, purslane, hairy vegetables, jellyfish, spinach, cabbage, corn and so on. Iodine-containing foods can promote the secretion of thyroxine, the body's thyroid secretion there is a kind of thyroxine called thyroxine, which can accelerate the oxidation of many tissue cells in the body, increase the body's ability to produce heat, so that the basal metabolic rate is enhanced, the skin blood circulation is accelerated to resist cold and cold.