Water is an essential nutrient for the body, as the body loses water through perspiration, breathing, bowel movements, and in urine. Water must be consumed regularly to maintain a sufficient level.
Water has many vital functions in the body, including…
Serving as a lubricant. Water is a main component of saliva, which helps moisten food making it easier to swallow. Water also helps lubricate joints, reducing friction and inflammation.
Water is important in body temperature regulation. When body heat rises, such as during strenuous activities, the body starts to sweat to cool itself. And sweat is made up almost entirely of water.