No one on this planet can live without this precious liquid for more than a few days. After all, we’re made mostly of water. Sixty percent of most adult bodies are water. Infants are true “water babies,” weighing in at eighty percent water. By retirement age, the ratio drops to around fifty percent. There is water in every cell of the body and in every type of body tissue.

Water in the body helps digest the sandwich you had for lunch and loads the blood with the dissolved nutrients, which it carries to each living cells. In the process, water helps carry toxins and waste products away from cel...