The problem of drinking water has always been a concern of human beings. In summer life, due to the hot climate and excessive sweating of the human body, most people have the problem of insufficient drinking water. Therefore, in summer, avoid drinking water when you feel thirsty, and you should drink water often. The daily intake of water from diet and drinking water by a normal person is about 2500 ml/day for adults, and the amount of water intake should generally be balanced with the daily excretion of water from the human body. For example, the average daily urine output of adults is about 1500 ml, the skin and respiratory tract excrete about 800 ml, and the stool is 100-200 ml, totaling about 2500 ml. Therefore, normal people need to drink about 1500 ml of water every day in addition to meals. About 6 to 8 glasses of water can meet the needs of human metabolism. Since water is so important to human beings, the quality of the water people consume every day is a crucial issue, which is directly related to human health.

At present, experts are inconsistent on whether it is better to drink pure water or tap water. Some experts believe that drinking water is to replenish water, there is no need to consider nutritional issues. Other experts believe that there are many trace elements and inorganic salts in tap water, which are beneficial to the human body. So what are the nutrients in tap water? The content of zinc and iron in 1000 ml of water is less than 0.2 mg. Adults need to supplement zinc 10 mg-15 mg and iron 12 mg-18 mg daily. The daily intake of trace elements from water is less than 1 mg, which is insignificant compared with the trace elements required by the human body. However, the water contains high calcium and magnesium elements, which are still beneficial to the human body. Since real pure water is filtered through multiple layers, impurities, trace elements, inorganic salts and disease-causing bacteria are generally removed from the water. It is safe, non-toxic, non-polluting, and hygienic. It is good for the human body, but the missing elements can be Ingest from food. Therefore, if economic conditions permit, the purchase of truly pure water is human progress. However, because the production of purified water is very irregular and mixed with fish, if you buy substandard products, it will be harmful to your health.