Water is the largest constituent of the human body. It comprises around 55% to 60% of body weight in the average person. Thus a 70 kg man has approximately 39 liters of water. The proportion of body water in the human body varies with the proportion of fat and other factors like salt.
Water is rapidly absorbed from the small intestine and in lesser quantity from the stomach. A small amount of water is also absorbed from the stomach. Getting adequate water is crucial for your health.
How much should you drink every day?