Water is a critical component of your optimal health program.  Man can go many days, even weeks, without food -- but deprived of water, life can end within three days.  Water composes more than half our bodies, one quarter of our bones, and one third of our brains.  It is present in every cell and tissue of the body and every bodily function, from breathing to eating to thinking -- is utterly dependent upon it.  Drink one 8-ounce (236 milliliter) glass of distilled water, with a pinch of salt (for electrolytes), every 1 to 2 hours that you are awake.   You may need to drink more when you are physically active. 

"Water is the only drink for a wise man." ~ Henry David Thoreau