You've heard the cliche that our body is made up of around 80% water; indeed we need lots and lots of water to maintain the stability of our body systems.
Water is the second most important element for our health; with the first being Oxygen. An adult can survive for several weeks without food but they can survive no more than 10 days without water, and no more than few minutes without oxygen!
Water is needed in our body for many many purposes such as carrier of nutrients to all body parts, maintaining body temperature, plays a crucial role in digestion, blood circulation, and still whole lot others.
Ideally, we should never go more than 15 - 20 minutes without consuming water.
For OPTIMUM health, experts recommend that each day, we should drink half our our body weight in ounces. So for a 200 pounds man, he should be drinking 100 ounces of water a day. -(Pure water has a density of 1kg / L)-