The majority of people are dehydrated.
Even mild dehydration will slow down one's metabolism as much as 3%
One glass of water will shutdown midnight hunger pains almost 100% of the time
Lack of water is the #1 trigger of daytime fatigue
Preliminary research indicates that 8-10 glasses of water a day could significantly ease back and joint pain for up to 80% of the sufferers.
A mere 2% drop in body water can trigger fuzzy short-term memory, trouble with basic math, and difficulty focusing on the computer screen or a printed page.
Source: Taken from a study at the University of Washington