Plain water has no calories and you will not gain weight if you drink too much of it. Drinking more water can maintain a good metabolism, help the body metabolic waste discharge. White water is no calories, drink more water will not increase the accumulation of fat, resulting in obesity, weight may be temporarily shown as an increase, but wait until after the discharge of water weight will return to normal, but fruit juices, beverages with high sugar content, drink too much will lead to obesity. Generally recommended daily water intake for adults is about 1500ml, you can drink a small amount of water to help the body to replenish water in a timely manner, if you drink too much water is not conducive to good health, will increase the burden on the kidneys, more than the amount of urine discharged by the kidneys, but also may lead to water intoxication, fatigue, nausea, and even cerebral edema, and so on.