When you drink water, you add to the natural circulation of fluids in the system. Your body’s systems get all they need through circulation. Your circulatory system is essentially a water works which counts on water to move quickly and freely. If it lacks adequate amounts of liquids it will be forced to slow down.
Furthermore, the kidneys require water to keep them running at optimum levels. If the kidneys are not adequately flushed, your liver ends up helping the kidneys and it’s your liver’s main function to regulate the way your body metabolizes fats and sugars. If your liver is having to perform double duty to pick up the slack from the kidneys, it will not be able to eliminate stored fat as efficiently.