The amount of water that adults drink every day is determined by the body's water metabolism, weight and body surface area.
Can be calculated according to body weight or body surface area:
Daily water demand (ml) = body weight (kg) X40 (ml).
Daily water demand (ml) = body surface area (square) X 1500 (ml).
Adults' daily water intake is 2000-2500ml, including drinking water 1 000- 1 200ml, food water 700- 1 000ml, and water produced by oxidized sugar, fat and protein 300ml.
Extended data
Harm of insufficient drinking water
When water is scarce, besides feeling thirsty, there will be dry skin, cleft lip, fatigue, less urine, dizziness, headache and other phenomena, and in severe cases, there will be mental symptoms such as fever and irritability. Lack of water will lead to the disorder of gastrointestinal digestion, blood nutrition and body fluid concentration regulation, and lead to other diseases, such as backache, deformed knee joint disease and arthritis.
The harm of drinking too much water
Excessive drinking water will lead to excessive salt loss in the human body. At first, there will be dizziness, weakness, rapid heartbeat and other symptoms. In severe cases, there will even be convulsions, confusion and coma, that is, water poisoning. However, excessive water or water poisoning in the body is rare in normal people, and it is generally more common in people with abnormal liver, kidney and heart functions.
Baidu Encyclopedia: Drink water