Water in nature contains a variety of impurities, such as calcium, magnesium, potassium, sodium, iron and fluorine, because it is in contact with the atmosphere, soil and rocks  Modern people tend to drink more and more pure water, such as distilled water, purified water and space water
The so-called impurities in natural water may be an important source of essential trace elements for human body
 However, drinking this super pure water for a long time will be harmful to health