Water suppresses the appetite naturally and helps the body metabolize stored fat.
Studies have shown that decrease in water intake will cuase fat deposits to increase, while an increase in water intake can actually reduce fat deposits. When they don't work to capacity, some of their load is dumped onto the liver. One of the liver's primary functions is to metabolize stored fat into usable energy for the body. But, if the liver has to do some of the kidney's work, it can't operate at full throttle. As a result, it metabolizes less fat, more fat remains stored in the body and weight loss stops.