Men drink more water can effectively replenish the normal supply of water metabolism in the body, the normal physiological function of the body has a role in promoting. Water is one of the main components that make up the body, and is an important material basis for maintaining life. For human life, water is more serious than the threat of fasting, for example, people such as fasting and only drinking water, can still survive for several weeks; but such as water, can only survive for several days, generally 3 to 5 days of water can be life-threatening. Insufficient water intake or excessive water loss can cause water loss in the body. But water is not the more you drink the better, water intake is mainly affected by metabolism, age, physical activity, temperature, diet and other factors, so the amount of water needs vary greatly. The Nutrient Reference Intake for Chinese Residents (2013 edition) compiled by the Chinese Nutrition Society points out that the appropriate intake of water for Chinese residents is 1.7 liters of water per day for adult males.