There are many waste products to eliminate when you are losing weight, and most of them are eliminated through urine. Some of these substances form crystals, which can cause kidney stones.
Drinking plenty of water helps your body get rid of waste products, which promotes better weight loss. Water also fills your stomach and helps prolong and intensify your sense of satisfaction after eating. If you feel a desire to eat between meals, it may be because you did not drink enough water in the hour before.