How much water should I drink each day? Should I drink water every day? Yes, like you lose water through your breath, perspiration, urine, and bowel movements! For your body to function properly, you must replenish what's lost, the water supply can be restored minimally by consuming beverages and anything that contains water. So how much water does the average, healthy adult living in a temperate climate require? Thanks to The National Academies of Sciences which has determined that an adequate daily water intake is: About 3.7 liters of water for men About 2.7 liters of water a day for women These replenishments cover fluids from water, other beverages, and food. About 20 percent of daily fluid intake usually comes from food and the rest from various kinds of drinks. Now What about the advice to drink 8 glasses a day? huh! You've probably heard the advice, "Drink eight medium-sized glasses of water each day." That's easy to remember, and it's a reasonable g