Based on the daily excretion and metabolism of normal people, people need about 2.5L of water a day, which comes from the above-mentioned drinking water, food water, protein, carbohydrates and fats. Metabolism produces water.

The food in the daily diet will provide people with about 1000ml of water. The water production of the three major energy-producing nutrients protein, carbohydrate and fat is about 300ml, so the amount of water you should drink every day is about 1200ml. However, it should be noted that in special environments such as high temperature and high altitude, daily water intake should be increased as appropriate.

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