Glucose syrup is a kind of starch syrup produced by the action of enzymes or acids with starch as raw material, and the main ingredients are glucose, maltose, maltotriose, maltotetraose and tetrasaccharide and above. Also known as liquid glucose, glucomaltose syrup .

Maltose is one of the carbohydrates, produced by the action of amylase-containing malt on starch. It is used as a nutrient and also for preparing culture medium. It is also a traditional Chinese nostalgic snack. Maltose is a chemical term that belongs to the class of disaccharides (disaccharides). It is white needle-like crystals. The common maltose is not crystallized, and the addition of sucrose during cooking turns the white maltose to a golden yellow color, increasing its color and flavor.