The most important source of health is water. The human body is made up of 70% water. Water makes up 90% of the blood, 80% of the brain, 75% of the muscles and 13% of the bones. Dehydration causes many health problems.
In a day, the kidneys filter the entire 3-liter plasma volume for about 60 times. This means that about 180 liters of fluid are filtered each day. Out of these 180 liters, an average healthy human produces about 1-2 liters of urine daily.