Water is the lubricant for the joints of the whole body, because 70% of the human body is composed of water. If the human body loses 10% of water, discomfort feelings start to appear and damage to body tissues. Consume enough water can relieve joint pain. The connective tissues between joints is cartilage, and cartilage is mainly composed of water, collagen, proteoglycans, glycosaminoglycans and other components. When cartilage has sufficient water, it can provide joint lubrication and cushioning, which helps to withstand the impact of heavy weight and exercise.