Disaccharides are carbohydrates formed from two monosaccharides joined together by a glycosidic bond. Disaccharides are found in many foods, such as table sugar (sucrose), lactose (found in milk), maltose (found in beer and other fermented beverages), and cellobiose (found in plant cell walls).

- Sucrose (table sugar): Sucrose is a disaccharide composed of one glucose molecule and one fructose molecule. It is the most common sugar in food and is obtained from sugarcane or sugar beets. It is commonly used as a sweetener in many foods and beverages.