The normal value of daily water consumption is about 1200-1500ml, because the daily water intake and intake and output are basically maintained at about 2500ml. Because the daily urine is about 1500ml, the water in the stool is 150ml, and the evaporation of breath and skin can take away 350ml and 500ml of water respectively, so the water discharged from the body is about 2500ml every day. In addition, protein, fat and carbohydrates produce 300ml of endogenous water in the process of metabolism, so 2500ml minus 1000ml of food water and 300ml of endogenous metabolized water, the amount of water to drink is about 1200-1500ml. 1200-1500ml between more appropriate.