Water, is the source of life, is the necessity of our survival, a side of the soil and water to raise a side of people. Drinking water can not only replenish the body’s essential nutrients, but also health Oh. Although we drink water every day, but you drink right? With the improvement of the economic level, most people have begun to use pure water instead of tap water, that is because tap water contains a lot of harmful substances, such as trihalomethanes, trichloromethane, dichlorobromomethane, trichlorobromomethane and tribromomethane and so on. So when you drink water, you must boil it, otherwise it is equal to chronic suicide. Here are a few kinds of water that you can not drink, take a look. What kind of water can not drink? 1, not open water – bladder cancer, rectal cancer Drinking unboiled water, the possibility of bladder cancer, rectal cancer increased by 21% -38%. When the water temperature reaches 100 ℃, these two harmful substances will be evaporated with the evaporation and greatly reduced, such as continue to boil for 3 minutes, it is safe to drink. 2, a thousand rolls of water – diarrhea, bloating, fainting and convulsions A thousand rolls of water is boiling on the stove overnight or for a long time of water, as well as electric water heaters in the repeated boiling of water. This water is cooked for a long time, the water is not volatile substances, such as calcium, magnesium and other heavy metal components and nitrite content is very high. Drinking this water for a long time, will interfere with human gastrointestinal function, temporary diarrhea, bloating; toxic nitrites will also cause hypoxia, severe coma and convulsions, and even death. 3, steamer water – premature aging, cancer steamer water is steamed buns and other leftover pot of water, many repeated use of steamer water nitrite concentration is very high. Drinking this water, or using this water boiled rice, will cause nitrite poisoning; scale often with the water into the human body, but also cause digestive, neurological, urinary and hematopoietic system lesions, and even cause premature aging, cancer. 4, aging water – esophageal cancer, stomach cancer Commonly known as “stagnant water”, that is, long time storage of water. Drinking this kind of water often will slow down the cell metabolism of minors and affect the development of the body; middle-aged and old people will accelerate the decline; many old places have increasing incidence of esophageal cancer and stomach cancer, which may be related to the long-term drinking of aging water. Toxic substances in aging water also increase with the increase in water storage time. So, in the end, what is good to drink water? 1, drink hard water or soft water? To understand drink hard water or soft water is good, first understand the relationship between calcium and magnesium ions and human health. Calcium and magnesium ions are essential nutrients for the human body every day, if the water has a certain hardness, through drinking water can supplement a certain amount of calcium and magnesium ions. If it is a person who takes soft water for a long time, it also needs to be supplemented through other ways. But the water hardness is too high and too low are not good, because the water hardness and some diseases have a close relationship. In areas with high water hardness, the incidence of cardiovascular disease in the population is low, but the incidence of kidney stones with the increase in water hardness and increase. The south of China is mostly soft water, and the northern region is mostly hard water. China’s drinking water standards are not more than 25 degrees, the most suitable drinking water hardness of 8-18 degrees, belonging to the mild or moderate hard water. Hard and soft water and taste also has a relationship, hard water is refreshing, most of the mineral water hardness is higher, so that people feel refreshing and delicious, soft water seems tasteless. But with hard water for tea, coffee, the taste will be affected. Some food processing water is more delicate, hard water will affect food processing, easy to cause protein precipitation, inorganic salt precipitation or more difficult to cook, and beverage water with soft water is better. Boiler water should generally make the hard water softening, otherwise there will be too much scale and accidents. 2, drink pure water or tap water? 1000 milliliters of water zinc, iron content of less than 0.2 milligrams, adults need to make up for the daily zinc 10mg-15mg, iron 12mg-18mg. Daily intake of trace elements from the water is less than 1 mg, compared with the human body needs trace elements is insignificant. However, the water contains high calcium and magnesium elements, which are still beneficial to the human body. The real pure water due to multi-layer filtration, generally removed from the water impurities, trace elements, inorganic salts and disease-causing bacteria, safe, non-toxic, non-polluting, hygienic, beneficial to the human body, and the lack of elements can be ingested from food. Therefore, if the economic conditions allow, the purchase of truly pure water, which is the progress of mankind. However, due to the current production of pure water is very unstandardized, fish eyes mixed, if you buy a substandard product, but harmful to the body. Tap water is produced by the water plant under strict quality control, drinking tap water can be completely at ease. But some high-rise buildings of the water tank whether there is pollution is worthy of people’s vigilance. As for the tap water scale because the water contains calcium, magnesium ions caused by the body has no adverse effects, tap water is affordable, the average working class is not necessarily to catch up with the market trend. 8 ways to drink water: 1, drink water before going to bed, can prevent heart attack and stroke. When the human body is dehydrated, the blood becomes viscous and the risk of heart attack increases. You can drink 1 cup of water 1-2 hours before bedtime, which can effectively reduce the risk. 2, get up and drink water, can prevent constipation. Drinking water in the morning can promote bowel movement. Before going to bed, you can put a glass of water at the bedside, and drink it immediately after getting up, the effect is doubled. 3, drink water before exercise, better performance. When there is enough water in the blood, it can supply more oxygen and nutrients to the muscles and cells, and it is not easy to be fatigued. 4, drink more water when drinking alcohol, alcohol has a diuretic component, so that blood vessels expand, body temperature rises, easy to cause the body to lack of water. Therefore, drinking more water when drinking alcohol can reduce thirst and other discomforts after drinking. 5, anxious and tired, drink water can wake up. Suddenly feel tired, anxious, cranky or brain inattentive, may be the body lack of water performance, at this time to drink a cup of water may be able to let you revitalize. 6, boil water after dark, the best water quality. Taiwan’s Hsin Kuang Hospital nephrologist Jiang Shou Shan said, because the water pipe day has been a large number of water rinse clean, this time the best water quality. It is best not to boil water in the morning, because after the water pipe static night, it is easy to deposit a variety of foreign objects, impurities. 7, a big mouthful of water, equal to no drink. Drinking too much water at one time will accelerate urination, and drinking water too fast, easy to cause gas and bloating. Therefore, it is best to drink slowly in small sips. 8, bottled water is most likely to breed bacteria, bottled drinks are easy to breed bacteria after the opening, try not to drink with your mouth against the bottle.