The water in our bodies is essential for life. Without water, we can’t survive. Since the water in our bodies is continually being used or lost, it needs to be continually replaced, and the best fluid to replace it with is water.
Water is involved in every bodily function from digestion and circulation through to the control of body temperature and the excretion of waste products. The water in our bodies is continually being used or lost from the body. Some is used or absorbed by the functions it performs and some is lost through sweat, urine and faeces.
About 60% of the adult human body is made up of water. In infants and children this percentage is even greater