We can survive for two months without food, but only a few days without water, yet most people grossly overeat and are consistently dehydrated. Why does this make any sense?

Second only to air, water is the most important element for survival. Why then do we choose to deprive our bodies of one of its most needed resources? Most people know that water is good for our health, but seldom do we know why. Water is used as nourishment and more importantly to remove waste. Without enough water to remove waste, we would be poisoned by own our waste products. Water lubricates our joints and it plays a big role in the chemical reactions related to digestion and metabolism. It carries nutrients and oxygen to the cells through the blood and helps to cool the body through perspiration. We need water to breathe as our lungs must be moist to take in oxygen and excrete carbon dioxide. I won’t go into great detail about how our bodies use water, but I want to list a few things that inadequate consumption of water can cause:
Constipation, joint and muscle pain, dry and itchy skin, acne, nose bleeds, repeated urinary tract infections, dry and unproductive coughs, constant sneezing, sinus pressure and headaches.