The amount of drinking water during the day and at night should be equal. Don't drink too much water in an hour.
Does not contain calories, and can be directly absorbed and utilized by the human body without digestion. Generally speaking, it is recommended to drink warm water below 30 degrees Celsius, which will not stimulate the peristalsis of the gastrointestinal tract too much and will not easily cause vasoconstriction. Sugary drinks will slow down the absorption of water in gastrointestinal tract, and long-term drinking in large quantities will have a certain adverse effect on human metabolism. Although sugary drinks such as orange juice and cola taste good, they should not be drunk too much. The daily intake should be in
control
One cup or so, no more than 200ml at most, and for diabetics and obese people, it is best not to drink. At present, tap water in China meets the drinking water standard, and drinking boiled tap water is safe.
Fresh boiled water is not only sterile, but also contains more than a dozen minerals needed by the human body. It is found that after natural cooling of boiled water, the chlorine in water is reduced by 50% compared with ordinary natural water, and the molecular structure of water will also change. The physical and chemical properties of water, such as surface tension, water density and electrical conductivity, have changed, and its biological activity is 4-5 times higher than that of raw water, which is very similar to that of water in living cells, so it is easily absorbed by human body through cell membrane. However, tap water can be directly drunk without boiling and disinfection, which is easy to be infected with intestinal infectious diseases such as dysentery, typhoid fever and cholera.
However, we should also pay attention to the ways and means of boiling water, not the longer the boiling time, the better, nor can we heat it repeatedly. Chlorinated tap water contains halogenated hydrocarbons and other 13 harmful substances, and boiling water is a good way to reduce harmful substances to a safe range. However, when the water temperature just reached 100 cC, the contents of halogenated hydrocarbons and chloroform were 1 10ug/ l and 99ug/l respectively, which exceeded the national standard. After boiling for 3 min, the contents of these two substances decreased rapidly to 9.2ug L and 8.3ug L, respectively, and quickly returned to the standard. If the water continues to boil, the contents of halogenated hydrocarbons and chloroform will decrease, but the contents of other non-volatile substances in the water will increase, which is also harmful to human body. Therefore, it is best to boil water for 3-5 minutes, which can completely eliminate bacteria and bacterial spores. Another misunderstanding of boiling water is repeated boiling. In this water, not only various minerals are lost, but also some harmful substances, such as nitrite, may be contained. Long-term drinking may lead to nitrite poisoning.
Drinking water should not be stored for too long, which is easy to breed bacteria, especially bottled drinking water. Bottled drinking water should be drunk within 2-4 weeks in autumn and winter, and within 7- 10 days in spring and summer.