(A) nutritionists answer "drinking water": How to drink water?
It says: Drink "eight glasses of water" every day. How much is this amount? This problem really bothers many people, because everyone drinks different cups. In our new diet pagoda, the image of water is added and the importance of drinking enough water is emphasized. Adults who live in a mild climate with light physical activity should drink at least 1200ml of water every day, that is, two bottles of mineral water, which is very vivid. Some people will ask, it used to be said that drinking water should not be less than 2000 ml every day. Why is there only 1200 ml now? In fact, 2000 ml refers to the total amount of water that people need in a day. Fruits and vegetables contain a lot of water, even in staple food and meat. A large part of the water people need comes from food.
June 2008165438+1October 4, 2008 saw an article "nutritionists answer" drinking water problem: how to drink water "online in Zhejiang. I felt very good and decided to record its main contents and attach some experiences. The purpose of making such a record on the blog is to better learn and understand the knowledge of Chinese medicine culture and health care, and also to share this knowledge with netizens (note: this color is written by bloggers, and other words are from the Internet. Welcome to exchange and spread this blog for more netizens to share. Thank you. )
The main points of the article:
1. Three nutritionists at the national level answered all kinds of "drinking problems" such as water nutrition, pH, detoxification function, drinking time, quantity, supplementary effect, the difference and nutritional function of pure water, boiled water, mineral water, overnight water, repeatedly boiled water, drinks and soup.
Second, water is a living body, an indispensable nutrient for the survival of animals and plants, and the most abundant component in the human body. As long as there is enough drinking water, people can survive for weeks without food; But without water, people will die in a few days.
Third, people sometimes feel more thirsty when drinking soup, because too much sodium ions are taken in the process of drinking soup, which changes the osmotic pressure in the body and needs to drink more water to neutralize it. Therefore, when cooking soup, we must control the amount of salt. Chicken mushroom soup is delicious, so you can add no salt.
Generally speaking, the content of nitrite in repeatedly boiled water will be higher. When nitrite enters the body, it will interact with human blood to form methemoglobin, which will make the blood lose its oxygen-carrying function and make people suffer from hypoxia and poisoning. When nitrite reaches a certain dose in human body, it has carcinogenic, teratogenic and mutagenic effects, which can seriously endanger human health. Adding a lot of nitrite can also directly poison people. Although the nitrite content in boiling water is not so high, try not to boil water repeatedly. It is also best to "burn hot water as you drink it" in the water dispenser, and don't keep it in a state of "heating-insulation" all the time.
The link address of the article is:/05zjhealth/system/2008/114/014973461.shtml.
Now copy the article as follows:
Nutritionists answer the question of drinking water: how to drink water?
"In our daily life, water is too common. But perhaps because of this, most people don't know how to drink water, what water to drink and when to drink water every day ... and this directly affects our health. " Professor Cheng Yiyong, vice chairman of China Nutrition Society, told the reporter.
Professor Li Ritter, deputy director of the National Food and Nutrition Advisory Committee, Professor Wang Yi, director of the Dietotherapy Nutrition Department of Guang 'anmen Hospital of Chinese Academy of Traditional Chinese Medicine, and Professor Cheng Yiyong jointly answered 10 "drinking water problem" which is closely related to health and is also the most concerned by the people.
Q: What nutrients are there in the water?
Li Ritter: There are indeed many people who care about whether there are various nutrients in water, but they ignore the most fundamental fact-water itself is a nutrient. We usually say that the human body needs six kinds of nutrients, which are actually carbohydrates, fats, protein, vitamins, minerals and water. Water is a living body and an indispensable nutrient for the survival of animals and plants. At the same time, water is also the most abundant component in human body. As long as there is enough drinking water, people can survive for weeks without food; But if there is no water, people will die every day. Therefore, whether you like drinking boiled water, tea or soup, you should take enough "water and nutrition" every day to keep the complex machine of the human body running normally.
The second question: Is boiled water the best way to replenish water?
Cheng Yiyong: This statement is somewhat one-sided. The hydration effect of boiled water is really good, but it may make people feel "bad" because of its single taste. Studies have shown that people usually consume more water when drinking their favorite drinks.
The latest edition of Dietary Guide for China Residents by China Nutrition Society also points out that the water content of most drinks on the market now exceeds 80%. The main function of the beverage is to supplement the water needed by the human body, and at the same time bring consumers a pleasant taste experience. However, many drinks contain a certain amount of calories, which will increase the calorie intake while replenishing water. Therefore, when drinking cola and other beverages, we must control the amount. Besides boiled water, a glass of milk in the morning and a glass of juice between meals are also good choices.
Three questions: What is the difference between the nutrition of boiled water, pure water and mineral water?
Li Ritter: In terms of composition, both boiled water and mineral water contain minerals, and pure water is pure water. In the north of China, such as Beijing, thick scale will be formed on the inner wall of the boiling pot, which is a manifestation of the existence of minerals. In this sense, boiled water is also a kind of mineral water. So, is water with minerals better than water without minerals? Not necessarily, after all, the mineral content in water is very small, which will not have a great impact on the supplement of minerals needed by the human body. Therefore, it is wrong to say that drinking mineral water for a long time will lead to excessive mineral intake or even poisoning, and it is also wrong to say that drinking pure water for a long time will lead to nutritional deficiency.
Four questions: Can you replenish water by drinking soup?
Cheng Yiyong: Of course, because more than 90% of the soup is water, it is a good way to replenish water. However, the soup we drink should not be too salty, otherwise too much sodium ions will change the osmotic pressure in the body, and we must drink more water to neutralize it-that's why we sometimes feel thirsty when we drink soup. Therefore, when cooking soup, we must control the amount of salt. Chicken mushroom soup is delicious, so you can add no salt.
The evaporation of water in the soup makes the soup thick and salty, which should also be one of the reasons why you are more and more thirsty when drinking soup, especially eating hot pot. )
Five questions: Can I drink water overnight?
Li Ritter: There may be some microorganisms in the water overnight, but it's not that serious to say how harmful it is to the human body. As long as it is not polluted, the nature of water will not change, so it is no problem to drink water overnight. The spring water we drink is probably more than 100 thousand years ago.
Six questions: Can you drink water that has been boiled repeatedly?
Wang Yi: Some people call this kind of water boiled water, which refers to the water repeatedly heated in a drinking machine or kettle. Generally speaking, the content of nitrite in this water will be higher. A large amount of nitrite can directly poison people, because nitrite reacts with human blood to produce methemoglobin, which makes blood lose its oxygen-carrying function and makes people suffer from hypoxia poisoning. Although the content of nitrite in boiled water is not so high, when nitrite reaches a certain dose in human body, it has carcinogenic, teratogenic and mutagenic effects, which can seriously endanger human health. Therefore, try not to boil water repeatedly. It is also best to "burn hot water as you drink it" in the water dispenser, and don't keep it in a state of "heating-insulation" all the time.
Question 7: Is the pH value of water really important?
Li Ritter: In the 1990s, Japan developed electrolyzed water, that is, using electrodes to treat water into acidic water for sterilization and alkaline water for health care. The efficacy of these two kinds of water is recognized by the Japanese Ministry of Health. However, this kind of alkaline water must have a pH value above 8.5 to reduce gastric acid and regulate intestinal flora. At present, some so-called "weakly alkaline" water on the market claims that drinking it can change the acid-base state of the human body, which is impossible and basically belongs to conceptual hype.
Eight questions: Can drinking water detoxify?
Li Ritter: First of all, what is "detoxification"? So far, no one can clearly express this concept. But human metabolism needs water. Drinking plenty of water can promote gastrointestinal peristalsis and relieve defecation. From this perspective, it is not wrong to say that drinking more water can detoxify.
Nine questions: Drink "eight glasses of water" every day. How much is this amount?
Cheng Yiyong: This problem really bothers many people, because everyone drinks different cups. In our new diet pagoda, the image of water is added and the importance of drinking enough water is emphasized. Adults who live in a mild climate with light physical activity should drink at least 1200ml of water every day, that is, two bottles of mineral water, which is very vivid. Some people will ask, it used to be said that drinking water should not be less than 2000 ml every day. Why is there only 1200 ml now? In fact, 2000 ml refers to the total amount of water that people need in a day. Fruits and vegetables contain a lot of water, even in staple food and meat. A large part of the water people need comes from food.
Question 10: How to drink water after getting up in the morning and before going to bed at night?
Wang Yi: The first glass of water in the morning is life-saving water, because after a night of metabolism, all the garbage in the body needs a kind of washing. Our cells are like a dry sponge. When the water goes in, we catch it and excrete it in about 40 minutes. This metabolic process is what we care about. In the morning, it is best to choose the following three kinds of glasses of water: the first kind is clear water, which can be boiled water, purified water and mineral water, which can reduce the viscosity of human blood; The second is lemonade. Citric acid can increase appetite in the morning. At the same time, citric acid has a small molecule, which does not affect kidney metabolism and is beneficial to urination. The third is light salt water, which is good for people with constipation.
Our family's breakfast habit is to soak rice, so breakfast contains a lot of water, which can be said to be equivalent to drinking one or two glasses of water every morning. Among my elders, my dead mother and four sisters all lived to be over 80 years old, among which my uncle lived to be 93 years old and my fourth aunt lived to be 89 years old. My grandmother also lived a long life, living for more than 90 years; My father, his two sisters and my aunt are all over 80 years old now, and they are still very healthy. Note: My grandparents and grandfather died more than 60 years ago, which is determined by people's living environment, not this case. )
As for hydrating at night, you can choose honey water, milk or yogurt, but people who are afraid of getting up at night should try not to drink water before going to bed. In addition, you can drink a glass of water after getting up at night, and you can drink it in the morning if you don't get up at night.
Source: People's Daily Online-Life Times Author: Hu Editor:
(2) Drinking good water can prevent cancer.
Water is indispensable to human body, and people drink it every day. But you should know that there are good and bad water, and drinking "good water" is good for human health. So, what kind of water is "good water" for human body?
The so-called good water must meet two standards: first, it is natural and exists in nature; The second is weak alkalinity (above 7.0). It is emphasized that "good water" must be natural, because any artificially made and produced water is a difficult substitute for human body and other biological cells. Weak alkalinity is emphasized because human blood is weak alkalinity, which will gradually acidify with the aging of human body or the development of diseases (the pH value of blood in infants and healthy period is 7.45~7.35, and it will drop to about 7.0 in old age and critical period).
For the human body, natural water is easier to get along with, and weakly alkaline water is more in line with the pH of human blood. These two points are very important. )
About 20% of the water we drink passes through the digestive tract, and 80% directly enters the blood circulation system and participates in various metabolism of the human body. Therefore, weakly alkaline water plays an important role in maintaining the weak alkalinity of human blood. However, artificially produced water (such as pure water, mineral water, distilled water, etc. ) are mostly acidic (the pH value is mostly between 5.6 and 6.5), and long-term drinking will cause the blood to be weakly alkaline. This is also the reason why the World Health Organization has determined the pH value of healthy drinking water to be 7.0~8.0.
As much as 80% of the water we drink goes directly into the blood (not indirectly). I really didn't expect it before. This shows how important it is to pay attention to drinking water hygiene. The artificially produced water has low pH value and is acidic. I think it may be for disinfection. It is not easy to deteriorate during storage, but it is not the best for human body. )
Drinking more "good water" can also prevent cancer. Medical research has found that the spread of cancer cells is first carried out through body fluids. If 70% of the water in the human body is natural and natural "good water", then human cells will have a healthy living environment, and the chances of survival, spread and deterioration of cancer cells will be reduced. At the same time, the vigorous metabolic capacity of the human body will soon update the diseased cells. Therefore, while seeking medical advice for cancer prevention and treatment, we should make a steady stream of "good water" full of cells and create a healthy living environment for cells. In tumor treatment, drinking more "good water" can promote the excretion of drug toxins, reduce the adverse reactions of drugs, and enable patients to successfully complete the treatment and receive the expected therapeutic effect. (The original "Old Weekly" 8. 9. Author Hou)
(the spread of cancer cells is first carried out through body fluids, and the most important thing is probably through blood, right? Healthy people's vigorous metabolic capacity will soon renew diseased cells. Therefore, how important it is for the human body to keep healthy! Usually, the human body will inevitably be in a polluted environment full of harmful gases, and it will inevitably inhale toxic and harmful liquids and foods in daily life. When these harmful things enter the body, we should first rely on our own metabolic ability and immune ability to exclude the invasion of harmful substances and even viruses, so as to maintain our health in a timely and comprehensive manner. )
Here, I think of a recent news that an enterprise in Anji County, Zhejiang Province has developed and produced baby water and pregnant women water. The price of this mineral water with a capacity of 1 liter is as high as 17 yuan and 19 yuan respectively. The original website is:/05 zjnews/system/2008/08/26/0098733.
According to the above analysis of "good water" and "bad water", it is not difficult to see that this kind of high-priced water is not only expensive, but also bad. What's more, letting young people such as infants drink such "fine water" for a long time will make the human body's ability to deal with all kinds of natural water not be exercised and improved. In the future, when they inevitably come into contact with non-"fine water", their bodies will be very uncomfortable and even cause serious injuries and irreparable consequences. )
(The so-called baby water, pregnant women's water, all kinds of formula milk powder and all kinds of drinks, etc. These are carefully crafted, which will bring great adverse consequences to the health of children and adolescents in the future, and it is by no means alarmist! )