AREAS OF INTEREST: WATER, DEHYDRATION, CELL VOLUME, ENERGY DRINKS, EXERCISE PERFORMANCE. by: Tom Seabourne Ph. D Approximately 70 percent of your body is water. Muscles are 3/4 water. The blood is 82 percent water. Your brain is 76 percent water. And your lungs are 90 percent water. Water is needed as a coolant, to digest and absorb food, transport nutrients, … [Read more...] about THE GREATEST SUPPLEMENT ON THE MARKET IS WATER.