What kind of water is suitable for people to drink?
Water is the source of health. Everyone should drink at least 6 to 8 glasses of water every day, which is people's health awareness of water. Drinking clean and pollution-free mineral water has become a trend. Others insist on drinking boiled water. In recent years, some people think that pure and healthy water can only be drunk through drinking water filters. What kind of water should we drink to be healthy? Lin Meijuan, director of the Nutrition Program Management Department of the Singapore Health Promotion Agency, said that every person loses 2 to 2.5 liters of water every day, through perspiration, lungs (water vapor in the air), kidneys (urine) and large intestine (excrement). She said that some of the lost water can be supplemented by daily intake. Many foods have high water content and can provide 500 to 750 milliliters (ml) of water for the human body every day. For example, she said: "Most vegetables and fruits contain 80% water, rice contains 60% water, bread contains 35% water, and meat and poultry contain 35% to 80% water (depending on processing and cooking methods)." Drinking 8 glasses of water every day is a recognized health standard. Generally, an adult of about 60 kilograms needs to consume 2.5 liters of water every day. Some people think that this water can be taken from various diets. Lin Meijuan said: "In addition to the usual diet, we should add 6 to 8 glasses of water, either soup or porridge." Of course, drinking pure water is more ideal. Mineral water is the "murderer" of hypertension, and water is an integral part of human cells. When cells lose water, they lose their function. Water helps the human body to absorb and digest food, also helps to regulate body temperature, and can also play the role of moistening and plane joint. & ltBR & gt She said, "Clear water is the most beneficial to the human body. Some sugary water will only increase the absorption of human heat and has no nutritional value. If these sugars exceed the daily energy needs of the human body and are not eliminated through exercise, it will cause obesity. " & ltBR & gt She encourages people to drink more boiled water, because some mineral water contains high sodium, which is one of the chief culprits of hypertension. In addition, taking too much sodium can also cause damage to the kidneys. Pure water can effectively promote human metabolism. High-concentration beverages, such as coffee, tea, soda, etc., can not only provide water for the body, but also absorb water from cells, leading to dehydration, so you can't drink more. Bottled water sold locally includes mineral water, purified water and distilled water. A spokesman for the Agriculture, Fisheries and Veterinary Bureau said: "Bottled water is produced locally and imported from other places. Manufacturers and importers must ensure the safety of these drinking water. The local bottled water manufacturer has obtained the license issued by the Agriculture and Veterinary Bureau. The Agriculture and Veterinary Bureau regularly inspects these manufacturers to ensure that the production meets the hygiene standards. " As for imported bottled water, the Bureau of Agriculture and Veterinary Affairs requires manufacturers to prove that the products are safe to drink by possessing the license and product hygiene certificate issued by the local government. Bottled water sold in the local market must be approved by the Agriculture and Veterinary Bureau before it can be put on the shelves. The authorities will also conduct regular product sampling tests. When people drink bottled water, avoid two or more people drinking the same bottle to avoid getting infected with germs. It is known that tap water contains less minerals than mineral water, but tap water contains chlorine and fluorine. Chlorine is sterilization, and fluorine is prevention of tooth decay. Singapore is one of the countries with the safest drinking water in the world. Drinking water is made according to the standards provided by the World Health Organization. Its standards include the weight of microorganisms and the weight of dozens of minerals. At present, there are distilled water on the market, but there are not many choices. In packaging, many people confuse it with mineral water because it is no different from ordinary mineral water. Distilled water is artificially purified water with a purity of 99.9%, but the mineral components in the water can be ignored. The function of this kind of "pure water" in the body is only a simple transportation work, such as taking out the things rejected by cells and tissues from the mineral water in vitro, and there are more than 20 kinds of mineral water sold in the market. Mineral water refers to a natural water source located underground, naturally gushing or artificially extracted, and rich in iron, calcium, sodium and magnesium. In the process of treatment, mineral and carbon dioxide are not added to mineral water. Except physical sterilization, water quality cannot be treated with chlorine or other methods. In addition, automatic equipment must be used for filling and sealing to avoid pollution. & ltBR & gt Generally speaking, natural mineral water can only be called "natural mineral water" if it gushes out of the ground without artificial processing and filtration. If clean groundwater is artificially extracted and properly sterilized, it is called "general mineral water". When you drink mineral water, you may wish to pay attention to the label on the bottle and see the mineral composition and international standards of mineral water. According to international standards, the regulations on mineral water are very strict. Three, spring water must naturally gush out, filtered by other rocks, and detected to be rich in natural minerals. 4. It must be packaged directly at the place of origin, and it is best to seal the cans within 24 hours to ensure that the cans are sterile and pollution-free. 5. The water quality must be continuously tested for about 10 years to determine the mineral content, and its stability can only be confirmed after obtaining the mark of the International Water Quality Association. There are many kinds of bottled water in the market, and the brands and drinking water names are different, so consumers should pay more attention to distinguish them. For example, natural spring water, natural mineral water, sparkling mineral water, some of which are drinking water or distilled water, and the raw water "raw water" is tap water. The local tap water meets the standards set by the World Health Organization. If you go abroad, try to avoid drinking tap water, because the sanitary level is different, and some tap water contains all kinds of harmful bacteria, viruses and parasites. Drinking it is easy to cause acute gastroenteritis, viral hepatitis, typhoid fever, dysentery and parasitic infection. Aged water, commonly known as "stagnant water", is water that cannot be stored for a long time. Drinking this kind of water often will obviously slow down cell metabolism for minors and affect the growth and development of the body; Middle-aged and elderly people will accelerate aging; According to medical research, the increase in the incidence of esophageal cancer and gastric cancer may be related to long-term drinking of aged water. Thousands of boiling water is water that has been boiled on the stove for a night or a long time, and it is water that has been boiled repeatedly with an electric kettle. This kind of water takes a long time to boil, and the content of heavy metals such as calcium and magnesium and nitrite in the water is high. Regular drinking of this water will affect the gastrointestinal function, causing temporary diarrhea and bloating. Toxic nitrite can cause hypoxia in the body, which can lead to coma, convulsion and even death in severe cases. Re-boiled water Some people are used to re-boiling the remaining warm water in the thermos bottle before drinking, so as to save water, electricity and time. But this practice should not be encouraged. Because water boils and then boils, water will evaporate and nitrite will rise. If you drink this water regularly, nitrite will accumulate in the body and cause poisoning. Bottled water can damage teeth? The New Zealand Medical Report pointed out that the statement that "drinking bottled water often leads to fluoride deficiency and damages teeth" is not necessarily correct, because ordinary people can ingest fluoride from sources other than drinking water. According to the report, drinking bottled water and filtered water by children and teenagers actually reduces fluoride intake, because these drinking water contains less fluoride than tap water. So, how can we get enough fluoride in peacetime? Huang Jiying, a local dentist, said that toothpaste is rich in fluoride, which is good for dental care. On the contrary, you should pay more attention to drinking highly acidic drinks and sports drinks, because the acidity of these drinks will erode your teeth. He said that in addition to water and toothpaste, tea also contains fluoride. However, excessive intake of fluoride will damage the enamel of teeth and have adverse effects on bones.