Nutrition Nutrition is the science that deals with food and how the body uses it. All living things need food to live. The food supplies energy, which people need to perform certain actions. Food also provides substances that the body needs to build and repair its tissues and to regulate its organs and organ systems. Food provides certain chemical substances needed in order for a person to maintain good health. These chemical substances are called …showed first 75 words of 462 total…

…showed last 75 words of 462 total…simple carbohydrates linked together. Fats are a highly concentrated source of energy. All fats are composed of an alcohol called glycerol and substances called fatty acids. A fatty acid consists of a long chain of carbon atoms. There are three types of fatty acids. They are saturated, monounsaturated, and polysaturated. This is a chart that describes the amount of fat per serving. The bold words can be found on many food products in the supermarket.