The polysaccharide found in plants (and food from plant sources) that humans can readily digest is called .

The polysaccharide found in plants that humans can readily digest is called starch. Starch is a carbohydrate made up of a large number of glucose units joined by glycosidic bonds. It serves as a major energy source for humans, as it is broken down into glucose by the digestive system. Starch is abundant in many foods derived from plants, such as potatoes, rice, corn, and wheat. Unlike cellulose, another polysaccharide found in plants that humans cannot digest, starch is readily utilized by the human body for energy, making it an essential component of a balanced diet.