Water is H2O – a combination of hydrogen and oxygen. It covers more than 70% of the earth’s surface. It is the basis for all the fluids in the body; every cell and organ needs water. It makes up about 50-65% of the human body, more than 75% of the brain, more than 80% of blood, and 90% of the lungs. Water is essential for life as we know it. A human being can go for 3 to 5 days (depending on a number of factors) without water.
Why do we need water?
Every single one of the thousands of biochemical reactions in the body needs water.
Water helps regulate our body temperature. It cushions and lubricates joints. It protects internal organs and nourishes the brain, spinal cord and other tissues. Water keeps our digestive and elimination systems working smoothly. Without water, skin becomes dry, flaky and prone to developing wrinkles.