Once boiled, boiled water lacks oxygen and beneficial minerals. Compared with the raw water phase, the biochemical effect of boiled water on human body is poor. For example, only cold boiled water can not raise goldfish, and only cold boiled water can raise flowers, and the flowers will die. People with health care experience say that drinking a certain amount of sterile raw water every day will make your body stronger and stronger as long as you persist. Foreign media have repeatedly publicized that "to stop taking drugs, please drink raw water first, because raw water can regenerate human cells". In short, drinking raw water has a health-preserving effect, but you must drink raw water that has been strictly filtered and disinfected without bacteria. 8. What are the disadvantages of drinking raw water? This kind of raw water generally refers to raw water that has not been strictly disinfected. There are various pathogens harmful to human body in water, such as bacteria, viruses and parasites. This raw water can easily cause acute gastroenteritis, viral hepatitis, typhoid fever, dysentery and parasitic infection. It is disadvantageous for people to drink tap water directly from urban water supply pipes. Although the tap water has been disinfected, it may not be completely disinfected every time, and after such a long pipeline process, drinking unboiled tap water may increase the possibility of various diseases. Nine, why can't aged water drink aged water, commonly known as "stagnant water", that is, water that can't be stored for a long time. Medical experts point out that water is aging rapidly. Water molecules are long-chain structures. If they don't hit hard often, this chain structure will expand and extend continuously, becoming aging water. Drinking aged water regularly will obviously slow down the metabolism of cells and affect the growth and development of the body for minors; For middle-aged and elderly people, it will accelerate aging. The high incidence of esophageal cancer and gastric cancer in many places is related to long-term drinking of aged water. Relevant data show that the toxic substances in aging water will also increase with the extension of water storage time. No matter what kind of bottled water, the storage time before opening should not exceed 10 day, and the storage time after opening should not exceed 3 days to avoid affecting health. X. Which water is harmful to people: Don't drink boiled water. Because with the gradual decline of the water temperature in the bottle, the chlorine-containing organic matter in the water will be continuously decomposed into harmful nitrite. Moreover, the water burns and burns, and the water evaporates, and the concentration of some heavy metal components and nitrite in the water will rise beyond the standard. It will cause different degrees of fatigue, fatigue, salivation, blood pressure drop, abdominal pain, diarrhea, vomiting, and may also lead to cancer of human cells over time. Don't drink overnight tea brewed in a thermos cup. Tea contains a lot of theophylline, aromatic oil and vitamins. When soaked for a long time, vitamins are destroyed, harmful substances increase, and tea becomes bitter, which is easy to cause dysfunction of digestive system and nervous system after drinking. Don't drink boiled water that has cooked food. Repeated boiling will increase some heavy metal particles and nitrite content in water, which is harmful to health.