The benefits of drinking water seem endless. We lose water constantly through perspiration, urine, sneezes, breathing, and even through tears that bathe our eyes and eyelids to keep them moist. You lose nearly 10 cups of water daily through normal bodily functions. If water you lose is not replaced, you can become dehydrated. Headache, fatigue, lightheadedness, muscle cramps and dulled thinking are all signs that your body may be suffering from mild dehydration and running on empty.
Most people actually get about as much water from solid food as they do from beverages.
The body treats the water from both sources the same. Aim to get at least half your quota from water itself, the rest from healthy beverages or solid foods, especially fruits and vegetables. Height, heat and reduced humidity increase the amount of water you lose through respiration and perspiration. Caffeine and alcohol pull as much water out of you as they put in. Diarrhea or fever.