Water is an important component of cells, muscles, and blood. Water accounts for 70% of the human body, but in older people, it drops to 50%. In general, we should drink at least 2 liters of water, divided into 6-7 cups to maintain the proper hydration. 

There are many stories about water and health because water is the basis of all living activities of our bodies. Our body can be seen in the form of cells and microorganisms that maintain their living activity in water. Without water, we would not exist. Therefore, if the body fluid is not adequate or the water quality is poor then will affect the development of serious diseases, either through simple physical fatigue and nervous system.

If you drink a large amount of water for a short time after sweating, sodium drops to the right amount, dizziness, vomiting, and in severe cases, helplessness. If water poisoning persists, brain pressure can rise and lead to stroke. Heart failure with poor heart function leads to poor blood circulation, limiting water intake to less than 1 liter per day. On the other hand, patients with respiratory diseases with pneumonia or bronchitis should drink plenty of water. Water can help maintain homeostasis in the body and release stimulants from the body.