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.
IMPORTANCE OF WATER. Water is our lifeline that bathes us and feeds us. In ancient cultures water represented the very essence of life. The Romans were the first to pipe water into their growing cities, especially with their aqueducts.
Nutritional Value of Water. Adequate water intake is vital for good nutrition. Water is a nutrient all its own, helping every cell in your body function properly. Most people get about 20 percent of their water through food and the rest by drinking water or other beverages.