Drinking glass of  water before eating means less food is needed in order for you to feel. full. Water is also a natural diuretic- an intake of water tells the brain that it is going to receive adequate fluid and therefore, less existing water needs to be retained in the body.

              Water has no calories- but drinking very cold water can actually cause claories to be burned, since the body must work to raise the  temperature of the water to body temperature. If you don't enjoy drinking water, add slice of lemon or lime, or add a few drops of flavoring extract to an entire pitcher of water and use it to make ice cubes..