Research has shown that drinking eight 8-ounce glasses of water a day can burn off almost 35,000 calories a year, or about 10 pounds. It helps if the water is cold; then, the body has to expend some energy to heat the liquid to the body's 98 degrees. If you don't drink enough water, one doctor reports, your body fluids are out of balance, you experience fluid retention, unexplained weight gain and loss of thirst.
How much should you drink? If you are not overweight, then drink the standard 64 ounces a day. If you are overweight, then some say you should drink an additional 8 ounces for each 25 pounds you want to lose. Others report that you should drink 1/2 ounce for each pound you weigh: if you weigh 100 pounds, then you drink 50 ounces; if you weigh 200, then you drink 100. You get the idea.