Organic compounds containing carbon, hydrogen, and oxygen. They're a very effective fuel source for the body. The different types of carbohydrates include starches, sugars, and fibers. (carbohydrates contain four calories per gram. Glucose-blood sugar-is a carbohydrate used by every cell in the body as fuel.
Digestible food components such as starches and sugars that are composed of carbon, hydrogen, and oxygen, but not nitrogen. Carbohydrates are the main constituent of most vegetables and fruits, provide four calories per gram, and are present only in small quantities in animal products.