Drinking unpolluted spring water on the mountain will not only prevent you from getting sick, but also enhance your gastrointestinal function. Strengthen your immune system, because the negative ions, oxygen ions and trace elements in such good water have not been destroyed by boiling. If it is tap water, you can't drink raw water. Chloric acid in it will harm your stomach and esophagus. Harmful substances are not precipitated by high temperature. Therefore, if you can drink water dripping from mountain springs or sandstone, it is best to drink raw water for a long time. If there are other aspects of health care, you can continue to ask.