Edible salt is better.

Edible salt needs to undergo deep purification in the production process, which can remove most of the impurities and harmful substances, while sea salt may retain some harmful substances in the refining process. Table salt, from the classification of well salt, sea salt, pool salt, rock salt, etc., people use salt is a kind of salt, salt is also an important element that the human body can not lack.

The origin of salt in China. The word "salt" originally means "to boil brine in a vessel". It is written in the Shuowen (说文), which states that what is born is called brine and what is boiled is called salt. Legend has it that during the time of the Yellow Emperor, there was a vassal named Chuangsha, who used seawater to boil brine and decocted it into salt, which came in five colors: green, yellow, white, black and purple. The Chinese started to cook salt around the time of Shennong (Yan Di) and Huang Di. Salt in ancient China was boiled with seawater.

Types of edible salt

There were many types of salt in ancient times, from the color there are: reddish snow, peach blossom, green, purple, white and so on. From the source is divided into: sea salt from the sea halide decoction, well salt from the well halide decoction, alkali salt is scraped alkaline soil decoction, pool salt from the pool halide air-drying, cliff salt is born in the soil between the cliffs. Sea salt, well salt, alkali salt three out of people, pool salt, cliff salt two out of heaven.

"Ming History" recorded: the salt of Xiezhou wind and water knot, the salt of Ningxia scraped the ground to get, Huai, Zhejiang salt boiling wave, Sichuan, Dian's salt Kapsui, Fujian, Guangdong salt accumulation of halogen, the salt of Huainan frying, Huaibei salt sun, Shandong salt have frying and sun, this is the big more also. Tao Hongjing, Southern Dynasty, "Medicine" recorded: East China Sea salt, North China Sea salt, South China Sea salt, salt ponds in Hedong, Liang Yi salt wells, West Qiangshan salt, Hu in the tree salt, color class is different to the Hedong for the win.

Reference: Baidu Encyclopedia - Edible Salt