Carbohydrate, which we often say, is also called carbohydrate, which is the main energy source of human body, including complex carbohydrates such as monosaccharide and disaccharide, and almost all foods contain carbohydrates. The sugar mentioned in the online article should actually refer to added sugar, that is, sugar and syrup added to food in the process of food production and production. The main components are sucrose, glucose and fructose.