Water is one of the six nutrients in human body. 65% of human body weight is water, and blood contains about 80% water. Lack of water or excessive water loss will lead to various diseases and accelerate the aging process. If the water loss exceeds 20%, life will be difficult to maintain. On the contrary, people who consume too much water, that is, people who drink too much water, will have water poisoning, which will also cause many diseases and damage their health. Therefore, scientific drinking water is particularly important. According to scientific research, in addition to the water contained in daily food, adults need 2000 ~ 2500 grams of drinking water every day. You should drink the water you need in the morning, at noon, in the afternoon and at night, so you don't have to drink too much at a time.
China ancient health care experts told people in drinking water health care: "Drink first, don't want to drink too much, don't drink too much." It means to drink water in moderation when you are not thirsty, don't wait until you are very thirsty, and don't drink too much water at a time. These are all health-preserving experiences. If this drinking principle can be achieved, the body will not cause the harm of water shortage, and it will not form the disadvantage of drinking too much.
For the elderly, because of physiological changes, the body often lacks water and does not feel thirsty, nor does it want to drink more water, which is very unfavorable to health. Therefore, the elderly must develop the habit of drinking water regularly several times a day, even if they are not thirsty, which is of great benefit to nutrition and health care, disease prevention and anti-aging.
At present, it is better to drink boiled water. Boiled water is a natural beverage and does not contain any artificial additives and pigments. Generally speaking, any beverage, tea, coffee, juice, soda, etc. It has its shortcomings and is not suitable for anyone to drink. Therefore, boiled water is suitable for everyone to drink.
But the boiled water mentioned here is qualified hard water.
Water can be divided into soft water and hard water, and water without minerals or with little minerals is soft water. Distilled water and purified water are absolutely soft water; River water, which is composed of rainwater and rainwater, has little mineral content and belongs to soft water. Drinking soft water often is the most harmful to human health.
Water containing many minerals is hard water. The determination of water hardness in China is to convert all minerals in water into calcium carbonate, and take the calcium carbonate content in each liter of water as the calculation unit. When the content of calcium carbonate in water is lower than 150mg/L, it is soft water. Hard water150 ~ 450 mg/l at the time of receiving; When receiving 450 ~ 7 14 mg/L, it is high hard water; When it is higher than 7 14 mg/L, it is extremely hard water. According to the hygienic standard of drinking water in China, hard water with calcium carbonate content less than 450 mg/L can be called moderate hard water. Drinking moderate hard water is good for health.
Domestic and foreign studies agree that calcium in hard water can be called a protective element of the body, which can prevent the body from absorbing harmful elements, especially reducing the absorption of lead by the intestine. Lead is a harmful element, which combines with cholesterol in the body, which will increase blood pressure and increase the chances of heart disease and stroke. Calcium and magnesium in hard water can decompose the fat in food in the intestine, form harmless compounds and excrete them quickly, thus reducing the absorption of fat and protecting cardiovascular and cerebrovascular diseases; Calcium in hard water is also the source of calcium nutrition demand of human body. Studies have shown that calcium in drinking water exists in ionic state, which is more easily absorbed by human body, with an absorption rate of 60%, while in food it is only 30%.
The water sprayed from the ground is mineral water, which is hard water because of its many minerals. However, mineral water has advantages and disadvantages, and high-quality mineral water is qualified drinking water, which is very beneficial to human body after drinking. Inferior mineral water is unqualified drinking water. After people drink it, it is not only beneficial to the human body, but also harmful or toxic to the body. Therefore, people must be careful when choosing mineral water, and must choose qualified high-quality mineral water. Chapter VI Four Seasons Health Care Middle-aged and elderly people should pay attention to developing good eating habits. They should be hungry first, not full, and stop before they are full. They should be thirsty first, but not too much.