The main food sources of carbohydrates are: sugar, grains (such as rice, wheat, corn, barley, oats, sorghum, etc. ), fruits (such as watermelons, bananas, grapes, etc. ), dried fruits, dried beans, root vegetables (such as carrots and sweet potatoes). ).
Carbohydrates are the main components and energy-supplying substances in the structure of living cells, and have important functions of regulating cell activities. There are three main forms of carbohydrates in the body, glucose, glycogen and sugar-containing complexes. The physiological functions of carbohydrates are related to the types of carbohydrates they ingest and the forms they exist in the body.