Adults should drink at least 12ml of water every day. Take a 2ml cup as an example, that is 6 glasses of water. If the physical activity momentum is large, or the ambient temperature is high, then it is necessary to drink plenty of water.

1. In fact, for healthy people, there is no such upper limit for the total amount of water to drink every day. This is because people's kidneys are very powerful, and even if they drink more water than necessary, they can be discharged. Of course, if you drink too much at once and exceed the excretion rate of the kidneys (about .7 to 1. liters/hour), it will cause water poisoning.

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

3. Drink a small amount of water for many times, and allocate the drinking time to any time of the day, each time about 2ml (1 cup). In this way, for people who work in the office or students in class, it is enough to drink half a cup to a glass of water every hour or so, and then drink one or two cups when they go home to rest.

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