Most people do not drink water at least 8 glasses a day. They mostly let the body of water shortage by the day.

If drinking water in accordance with the needs of the body then uses the acquired include:
Can prevent our bodies from the danger of poisoning caused by toxic metabolic waste.
Can help aid digestion and metabolism and can also carry nutrients and oxygen to the blood cells
Can help breathing. We lost a number of fluid every day while exhaling. If the amount of body fluids is not balanced, may interfere with physiological functions in the body.
Drinking water can be if you lose weight and helps to strengthen muscles and maintain employment and function of the digestive organs of the body

Body’s need for water to drink an average of 2 liters per day. Most people are sometimes afraid to drink plenty of water because it will cause you will be routine to the bathroom to throw urine. Initially it could happen because the bladder is sensitive to the addition of liquids. But after a few weeks, the bladder will get used to and more relaxed so you do not have to bother to the bathroom again.

The recommended drinking water is pure water, not drinks such as beer, tea, coffee or fruit juice. For species that are not drinking water will contain other ingredients such as alcohol, cafein, tannin or sugar.