The current recommendations for daily water consumption are mainly 2000 ml (8 cups), 1500 ml and 1200 ml (6 cups, note that this cup is not the other), these values are only approximate estimates, there is no Which one is absolutely convincing. Drinking 1,200 milliliters (6 cups) of water per day is recommended by the "Dietary Guidelines for Chinese Residents 2007", which is more authoritative, but it is the "minimum water intake" rather than the "optimal water intake". Therefore, according to body weight and temperature , How much sweat, how much water the food contains, labor intensity, and sun exposure, drinking 1200 ml to 2000 ml or more per day should be appropriate. It should be pointed out that although in theory, excessive water will cause water poisoning, manifested in lung water and kidney failure, but normal people rarely occur, almost the only visible situation is drowning.

　　Under special circumstances, such as high temperature work, a lot of sweating, a lot of training or competition, athletes should take the initiative to increase the amount of drinking water (that is, don’t wait for thirst to drink water). The principle is to ensure adequate urine output. That is to make the urine volume sufficient by drinking water (including liquid food or beverages, etc.), the goal is that the urine color is clear and no color (the suggestion is selected from the editor of "Encyclopedia of Sports Medicine Volume VII": (English) Ronald J Moen, Yang Zeyi, translation and review, published by the International Olympic Committee Medical Committee, International Federation of Sports Medicine, published by People’s Sports Press in 2005).

In addition to the above special circumstances, drinking plenty of water (3000 ml or more per day) also has additional benefits for some diseases, such as: constipation, hyperuricemia (or gout), and high blood viscosity , High blood fat, kidney stones, low blood pressure, food allergies, drug poisoning, etc.

　　Of course, there are also some diseases that need to limit drinking water (less than 500 ml per day or as directed by your doctor), as long as there is edema, whether it is renal insufficiency, heart failure, or liver cirrhosis, fluid intake must be restricted (Including drinking water and liquid food).

　　It must be pointed out that although water is the source of life, water has extremely important physiological functions, and ensuring sufficient water intake every day is good for health, but don’t think that drinking more water is more beneficial, claiming that ordinary people can drink plenty of water. Beauty, weight loss, detoxification, etc. are unfounded and sometimes counterproductive.