China Green Food Development Center said: "Safety, high quality and nutrition" embodies the quality characteristics of green food. The first characteristic is its safety, that is to say, the food will not cause harm to the body under the condition of reasonable consumption and normal consumption. As we all know, an adult needs to drink about 2000 ml of water every day to keep water balance. If an adult drinks about 2000 ml of pure water every day, will it do harm to his health if he drinks it for a long time? Professor Jin of beijing university of chemical technology Water Resources Research Center said: "Water molecules in pure water are extremely series and linear, and it is not easy to pass through the cell membrane, which will lead to the loss of beneficial life-related elements in the body. Some sensitive people will not quench their thirst more and more. The more they drink, the more they want to drink, which will reduce human immunity and even cause some diseases. " Professor Wang Shiwen, an expert on cardiovascular diseases in China and an academician of China Academy of Sciences, pointed out: "Drinking soft water with less minerals for a long time is one of the causes of atherosclerosis." The Naval Medical Research Institute provided a clinical response: "Zhoushan island soldiers drank rain for half a year and generally felt weak." After testing, rainwater lacks minerals and its water quality is similar to pure water. This is an example of the health hazards caused by reasonable drinking methods and normal drinking. Can it be said that pure water is safe food? Hundreds of millions of adults in China drink tap water, natural water or mineral water in the same amount as pure water every day (about 2000 ml). They haven't heard or seen reports about health hazards for more than ten years or decades. In contrast, it is safe to drink tap water, natural water and mineral water often, but it is not safe to drink pure water often.

Second, pure water has no nutrition.

China Green Food Development Center said: "In addition to safety, high quality and nutrition are also important characteristics of green food, which are reflected in the product standards of green food and require it to have excellent sensory characteristics, quality and nutritional value." In this way, green food not only needs excellent sensory characteristics and quality, but also needs excellent nutritional value. Is the nutritional value of pure water high? The affirmative answer is: no! As we all know, after purified water is treated, trace elements and macro elements necessary for human body in water are removed at the same time. Water is an important way for human body to obtain minerals, and it is also the main source under special conditions. Professor Wang Zhansheng from the Department of Environment of Tsinghua University stressed: "At the very least, the existing diet structure of China residents is relatively simple, and it cannot completely and naturally supplement various elements. Therefore, the nutritional role of drinking water cannot be ignored. " Professor Li Fuxing, a water nutrition expert and chairman of the Health Drinking Water Professional Committee of Chinese Medical Association, said: "It has been proved that there are nearly 10 kinds of trace elements necessary for human body in water. As far as the current dietary structure in China is concerned, many trace elements are difficult to obtain from food, mainly from water. The absorption rate of calcium in water can reach over 90%, while the absorption rate of calcium in food is only 30%. " Professor Zhu Huigang, head of the National Drinking Water Hygiene Group and Shanghai Medical University, stressed: "For drinking water, the purer the better. Inorganic elements in water exist in the form of dissolved ions, which are easily absorbed by human body. Therefore, drinking water is an important way for people to absorb minerals. Pure water contains almost no minerals. Previously, it was mainly used for boilers in thermal power plants, washing in electronics industry, integrated circuit boards and so on. Drinking pure water should be cautious, especially for children, the elderly and pregnant women. " The healthy drinking water proposed by the World Health Organization must meet six conditions, namely, no harmful substances, moderate minerals, moderate hardness, rich oxygen, small water mass and weak alkaline pH value. Pure water basically contains no minerals, its hardness is close to 0, its oxygen content is very low (distilled water is 0), its water cluster is large (> > 100Hz), and its pH value is around 6.0, so it is weakly acidic. The drinking water quality standards in Canada and Russia stipulate that the hardness should not be less than 50mg/L (calculated by CaCO3), and the standard hardness of drinking water quality in Europe and America should be kept above 60. Obviously, pure water does not meet the conditions of healthy water, and it has no nutrition, let alone excellent nutritional value. How can it be called green food?

Third, drinking pure water for a long time affects your health.

Water is the most important of the six nutrients on which human beings depend, and minerals and trace elements in water are very important to human health. Professor Jin from the Center for Life Dynamics and Water Resources Research in beijing university of chemical technology pointed out: "Water plays a very important role in the origin and continuation of life. In this sense, it cannot be said that water is used to quench thirst. The far-reaching significance of water lies in maintaining human health and prolonging life. " When choosing drinking water, people should pay more attention to whether it is beneficial to health and whether pure water is beneficial to health. Dr Chai Weizhong, from the Center for Public Nutrition and Development of the National Development and Reform Commission, emphasized in the "2005 China Drinking Water Industry Forum" that "pure water has a strong ability to dissolve minerals and trace elements. After people drink a lot of pure water, the original trace elements, nutrients and nutrients in the body will quickly dissolve in pure water and then be excreted, which will make the nutrients in the human body out of balance, leading to health deficit, which is not conducive to health. Nowadays, many countries in Europe stipulate that pure water cannot be directly used as drinking water. " Martin Fox, MD, a famous American water expert, emphasized in the book Healthy Water: "Drinking polluted water and desalinated water (purified water) will do harm to our health." Ding Nanhu, a researcher from the Water Supply Department of China Naval Medical Research Institute, conducted experiments on mice for seven years from 1987 to 1994, and let them drink distilled water for a long time. The results showed that the mice grew slowly, lost weight, suffered from osteoporosis, muscular atrophy, and the functions of pituitary and renal gland system were destroyed. The garrison on an island in Dalian used to drink homemade distilled water (pure water). For a long time, officers and men suffered from various diseases lacking minerals. Chen Mengxiong, a senior academician of Chinese Academy of Sciences, said: "Drinking purified water for a long time will reduce the intake of minerals and beneficial elements. From a health point of view, natural water is better than pure water, and mineral water is better than natural water. " A large number of animal experiments and clinical reactions at home and abroad have proved that drinking purified water for a long time is harmful to health. To this end, the Shanghai Municipal Education Commission has issued a notice: in principle, since the school year of 1997, all primary and secondary schools and kindergartens are not allowed to use pure water as drinking water for students and children. The Shanghai Municipal Administration for Industry and Commerce has also issued a notice: advertisements for pure water should not promote "long-term drinking" and use pure water to prepare milk powder and cook. In March 2003, some primary and middle school students in Hangzhou bid farewell to pure water, and more than 654.38 million primary and middle school students drank mineral water. Recently, the China Consumers Association officially issued a warning: teenagers, children and the elderly should not drink pure water for a long time. The basic goal of green food is health. Drinking purified water for a long time will not promote health, but will do harm to the body. How can it be called colored food?

Since drinking pure water has entered the market, what water to drink has always been a topic of great concern to consumers. After several years of heated debate, the conclusion is clear. Drinking pure water for a long time is not good for your health. Mineral water is an ideal drinking water. Zhu Huigang, head of the National Drinking Water Hygiene Group, a professor at Shanghai Medical University and a doctoral supervisor, said: "Mineral water is different from ordinary drinking water. It contains trace elements such as lithium, strontium, zinc, iodine and selenium, and some of them are rich in macro elements, which can supplement the trace elements and macro elements needed by the human body and regulate the acid-base balance of the human body. These characteristics are not available in ordinary drinking water. Mineral water is the crown of healthy drinking water. " Researcher Xu Fang, a senior health expert from the Institute of Environment of China CDC, pointed out: "Mineral water is different from ordinary groundwater because it contains a certain amount of minerals, trace elements or carbon dioxide gas that are beneficial to human health. Because this kind of water is not polluted by outsiders and contains no heat, it is an ideal healthy drink for human beings. We have conducted animal experiments on more than a dozen representative mineral waters in China. The results show that these mineral waters have different anti-tumor effects. Some epidemiological survey data also show that mineral water does play a great role in promoting human health and prolonging life. " Drinking natural mineral water that meets the quality standards of medical mineral water can prevent, treat and alleviate some diseases. Water is the source of health. Everyone should drink at least 6 to 8 glasses of water every day, which is people's healthy cognition 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 water should I drink to be healthy?

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.

Mineral water is the murderer of hypertension.

Water is an indispensable 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.

Encourage people to drink more boiled water, because some mineral water is high in 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.

Know the three main kinds of drinking water

tap water

Tap water contains less minerals than mineral water, but 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 dozens of minerals.

distilled water

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 "pure water" in the body is simply to act as a transportation job, such as taking out what cells and tissues refuse.

mineral water

There are more than 20 kinds of mineral water on 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.

Generally speaking, it can only be called "natural mineral water" if it gushes out of the ground without artificial processing and filtration. If it is artificially extracted clean groundwater, it is called "general mineral water" after moderate sterilization.

International standard of mineral water

If mineral water is regarded as an international standard, the regulations are very strict.

1. Height: spring water is 50-2500m above sea level, and mountain spring water is over 2500m above sea level.

2. Water source: Fiona Fang 10 km should have no water pollution change.

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. Such as natural spring water, natural mineral water, foamed mineral water, drinking water or distilled water.

Get sick again.

unboiled water

"Raw water" refers to 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. It is easy to cause acute gastroenteritis, viral hepatitis, typhoid fever, dysentery and parasitic infection after drinking.

Aging water

Commonly known as "stagnant water", that 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.

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.

Boiling water again.

Some people are used to boiling the warm water left in the thermos before drinking, in order to save water, gas, electricity and time. But this practice should not be encouraged. Because water boils and evaporates, 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 most people can ingest fluoride from sources other than drinking water.

According to the report, children and teenagers drink bottled water and filtered water, which virtually reduces fluoride intake, because these drinking water contains less fluoride than tap water.

So, how can we get enough fluoride? 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.