Raw water may contain some pathogenic microorganisms such as bacteria, viruses, parasites, or eggs, and may also contain some harmful chemical components. After drinking these unhygienic raw water, it is easy to get sick. After the water is heated and boiled, the pathogenic microorganisms have been killed. Some harmful chemical components are decomposed after heating, and the possibility of causing diseases to the human body is greatly reduced or eliminated.
There are a large number of bacteria in spoilage beverages. The toxic and harmful products produced by these bacteria can cause poisoning, dizziness, headache, nausea, vomiting, abdominal pain, diarrhea, high fever, convulsions, and even life-threatening, so spoiled drinks cannot be drunk. .