We often hear that we should drink eight 8-ounce glasses of water a day. However, there is some controversy about this figure and what it really means. Water is an essential nutrient. It is necessary to sustain all forms of life, and humans can only live a few days without it. It is also a healthful drink. Health authorities and others often encourage people to consume 2 or more liters of water a day, but is this only plain water or does water from other sources count?
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Drinking enough water every day is good for overall health. As plain drinking water has zero calories, it can also help with managing body weight and reducing caloric intake when substituted for drinks with calories, like regular soda. Top of Page. Section Navigation.
You are constantly losing water from your body, primarily via urine and sweat. To prevent dehydration, you need to drink adequate amounts of water. Health authorities commonly recommend eight 8-ounce glasses, which equals about 2 liters, or half a gallon.