In general, foods are made up of carbohydrates, proteins, and fats, each of which provide a different number of calories: 1  Carbohydrates provide 4 calories per gram. 2  Proteins provide 4 calories per gram. 3  Fats provide 9 calories per gram.
You need water to digest your food and get rid of waste, too. Water is needed for digestive juices, urine (pee), and poop. And you can bet that water is the main ingredient in perspiration, also called sweat. Besides being an important part of the fluids in your body, water is needed by each cell to function normally. Your body doesn't get water only from drinking water. Any fluid you drink will contain water, but water and milk are the best choices. Lots of foods contain water, too.
Water and The Brain by Dr. Corinne Allen www.brainadvance.org Why is Water So Important for the Brain? The Brain is 85% water. Optimal brain function depends on water and lots of it. Water is what keeps the brain signals going. When the quality of water is compromised the signals are short circuited. Water supports DNA and is the largest single source of energy. The brain has no way to store water and dehydration comes if all the water lost in a day is not replaced and this deficiency is accumulated.