The main difference between non-iodized salt and iodized salt is the amount of iodine added. Non-iodized salt is a salt without iodine; Iodized salt is added with a certain amount of iodine according to the national food safety standards, generally 20mg/kg-30mg/kg.
General healthy people should eat iodized salt, especially families with children, pregnant women and lactating women. Iodized salt is called iodized salt, and the most commonly used iodine is potassium iodate, potassium iodide and sodium iodide, sometimes to make it more mobile. A small amount of magnesium carbonate was also added.
Iodine is one of the important nutrients in human body. From 1996, China began to implement the policy of universal iodization of salt, and every household began to eat iodized salt. China stipulates that the iodine intake of residents is 150μg/d, and the concentration of iodized salt is 200μ g/d. The iodine intake of people in China has obviously increased, with an average iodine intake of 200-500μ g/d..
Types of salt
1. sea salt: salt made by drying in the sun with sea water, with an average salt content of 27kg per1000kg of sea water. The eastern coastal areas of China, Taiwan Province Province and Hainan Province are rich in sea salt, which has been the main source of salt production in China. At present, China's sea salt production ranks first in the world, accounting for about 80% of the national salt production.
2. Lake salt: also known as "pool salt", it is formed by evaporation of inland salt lakes or salt lake water. Qinghai, Inner Mongolia, Xinjiang, Tibet, Gansu, Ningxia, Shaanxi, Shanxi and Jilin provinces (regions) have a large number of salt lakes; The salt reserves of Qaidam Basin in Qinghai Province exceed 50 billion tons.
3. Well salt: extracted from shallow surface or underground natural brine by sedimentation method. These wells are generally tens of meters or even hundreds of meters deep, but the wellhead is only as big as a rice bowl. What was taken out of the well was not massive salt, but dark and thick brine. Boil salt water in a large pot and you will get sparkling salt.
4. Mineral salt: Mineral salt is extracted by mining rock salt deposits. Because those rock salt deposits sometimes coexist with natural brine salt deposits, drilling water solution method is mainly used in mining, so they are also called well salt and mineral salt-well salt. Huai 'an, Jiangsu Province has the largest salt mine in the world, with a reserve of over 200 billion tons.
People's Network-There are so many kinds of salt, how to choose?