Iodine is an essential trace element for human body. Eating iodized salt in moderation every day can not only meet the human body's demand for iodine, but also will not cause excessive intake of iodine. Still relatively healthy. The content of sodium chloride in low sodium salt is 60~80%.
Salt is divided into well salt, sea salt, pool salt and rock salt. Including iron, calcium, zinc, potassium, sodium, iodine and other nutrients. The salt people use is a kind of salt, which refers to the salt rich in sodium, that is, sodium chloride. Salt is also an indispensable element for human body, which can regulate human activities.
The state stipulates that the content of sodium chloride in well salt and mineral salt shall not be less than 95%. Salt contains barium salt, chloride, magnesium, lead, arsenic, zinc, sulfate and other impurities. We stipulate that the content of barium should not exceed 20 mg/kg.
Types of salt
There were many kinds of salt in ancient times, including crimson snow, peach blossom, blue, purple and white. From the source, it can be divided into: sea salt is fried by sea brine, well salt is fried by well brine, alkali salt is fried by scraping alkaline earth, pool salt is dried by pool brine, and cliff salt is born between soil cliffs. Sea salt, well salt and alkali salt come from people, while pool salt and cliff salt come from heaven.
"Ming History" records: "Xiezhou salt is made of geomantic omen, Ningxia salt scraped the ground, Huai and Zhejiang salt boiled, Sichuan and Yunnan salt pumped wells, Fujian and Guangdong salt bittern, Huainan salt fried, Huaibei salt dried, Shandong salt fried and dried, with a large scale." Tao Hongjing's Records of Famous Doctors in the Southern Dynasties recorded that East Sea Salt, North Sea Salt, South China Sea Salt, Hedong Salt Pool, Liang Yi Salt Well, Xiqiangshan Salt and Huzhongshu Salt have different colors, and Hedong Salt wins.