According to the Dietary Guide for China Residents, healthy adults need about 2,500 ml of water every day. Considering the moisture in food, the guide suggests that adults with mild physical activity should drink at least 65,438+0,200 ml of water every day under mild climate conditions. Take a 200ml cup as an example, that is 6 glasses of water. If the momentum of physical activity is high, or the ambient temperature is high, then drink more water.

In fact, for healthy people, there is no upper limit for the total amount of water to drink every day. This is because people's kidneys are very strong, and the water they drink can be discharged even if it is more than necessary. Of course, if you drink too much at once and exceed the renal excretion rate (about 0.7 ~ 1.0 liter/hour), it will cause water poisoning.

In addition, people with heart and kidney diseases should not drink too much water, which will add unnecessary burden to these diseased organs.

Extended data

Drinking taboo

1, don't drink boiled water.

Chlorine in tap water reacts with residual organic matter in water to form a carcinogen "trihydroxy". In addition, pregnant women should not drink boiled water stored in thermos for more than 24 hours, because with the decrease of water temperature in thermos, chlorine-containing organic matter in water will be continuously decomposed into nitrite, which is very unfavorable to the health of pregnant women and fetuses.

Pregnant women should not drink water until they are thirsty.

Thirst, like watering a cracked field, is the result of water shortage, not the beginning. It is a rescue signal that the brain center requires hydration. Thirst is the imbalance of water in the body, and the cells are short of water to a certain extent. Pregnant women should drink water every 2 hours, 8 times a day, *** 1600 ml.

Don't drink boiled water repeatedly for a long time.

For example, the concentration of harmful substances such as silver nitrite, nitrite ion and arsenic in the boiling water of large boilers will increase after repeated boiling. Drinking this kind of boiled water for a long time will easily lead to a low level of methemoglobin in the blood, which will turn into methemoglobin that cannot carry oxygen, causing blood poisoning.

People's Daily Online-How much water you drink varies from person to person.

People's Network-How much water should expectant mothers drink a day? Remember three taboos