Water is a vitally important component of any valuable and useful nutrition plan. This statement is hardly earth shattering or groundbreaking and few (if any) jaws will drop at the sight of it. It is common knowledge that water is essential to our survival as living beings. Most people are very well aware of this fact, but do they really know why water is so essential? What does water do in our bodies and why does it make a difference what kind of water we drink? Is a water filter truly necessary and worth its price? Read on to learn the answers to these questions and find out how much you know (or don