The main benefit of drinking water before meals is to relieve certain hunger, in addition to quickly replenish the body’s water. Water accounts for 60-70% of the body weight, is a very important life-sustaining substances, the stomach before the meal is in a fasting state, the concentration of stomach acid is high, the feeling of hunger is also very strong, appropriate to drink a small glass of water, not only can dilute stomach acid, but also can relieve hunger, help control appetite. In addition to drinking water before meals can also quickly replenish the body water, fasting state, water in the stomach to stay a short time will enter the small intestine, then will be quickly absorbed by the mucosa of the small intestine into the bloodstream, and then almost completely absorbed and utilized by the body. However, it is not advisable to drink too much water before meals, because drinking too much water will dilute the gastric juice, weakening the digestive role of gastric juice, so that the next food eaten into the food can not be well digested and absorbed, in the long run it is easy to cause gastrointestinal tract dysfunction.