Water, bar none, is the best beverage in the world. You cannot live without it, and it is necessary for almost every metabolic process. I bet you didn't realize that your body is 83 percent water. Your muscles are 75 percent, your brain is 74 percent, and your bones are 22 percent water. Water is necessary to digest and absorb nutrients and vitamins, and it carries away metabolic waste.  

Water can improve energy, increase mental and physical performance and remove toxins and waste from your body. It keeps your skin healthy and glowing, and may even help you lose wait.

If you're dehydrated or under dehydrated, your blood is thicker and your body has to work that much harder to cause it to circulate. As a result, your brain becomes less active, it's harder to concentrate and you feel fatigued.  

Water is one of the fluids that lubricates and cushions your joints and muscles, protecting them from shock and damage. If the body is dehydrated, it may become more susceptible to ailments.

Let me give you an analogy. You're walking in the woods and you come upon a pond. The pond hasn't seen life in ages. There's a brown scummy film floating on it, the water is brown and dirty, it looks stagnant, and there are flies and mosquitoes buzzing around it.  Now, picture yourself on that same walk in the woods and you come upon a mountain glacier. The water is flowing freely down the rocks and looks clean and clear and crisp.  

   

Which water would you rather have in your body?