A large group of sugars, starches, celluloses, and gums that contain carbon, hydrogen, and oxygen in similar proportions. The primary function of carbohydrates is to provide energy for the body, especially the brain and the nervous system. The body breaks down starches and sugars into a substance called glucose, which is used for energy by the body.
Carbohydrates are important sources of energy.
The majority of carbohydrates are in the form of starch. Major starch sources are corn, wheat and potatoes. Carbohydrates may be classified as simple or complex. Glucose is the primary energy source for the brain and nerves. Simple carbohydrates are usually rapidly absorbed and utilized by the body.