[Hydration status and health].

Water is an important component of human body and plays a variety of important physiological roles. The intake and discharge of human water is in a dynamic equilibrium. Insufficient water intake will affect the hydration status of human body, which in turn affects cognition and health. Therefore, maintaining proper hydration status is of great importance for maintaining and promoting the health of the body. There were many indicators to evaluate the hydration status of body, including urine and blood plasma biomarkers. It is of great significance to evaluate the hydration status of body, keep the body in a suitable hydration status by replenishing water in time. The lack of drinking water in different populations in China is common, but it has not yet received enough attention and needs to carry out corresponding health education.