Yes. Reducing sugars are sugars that have reducing properties. Among sugars, monosaccharides that contain free aldehyde or ketone groups in their molecules and disaccharides that contain free aldehyde groups have reducing properties. The main reducing sugars are glucose, fructose, galactose, lactose, and maltose.

Maltose is a disaccharide formed by the condensation of 2 sugar molecules with а glycosidic bond. It is the main component of maltose, produced by the action of amylase-containing malt on starch. It is commonly used as a nutrient and for preparing culture media. Maltose can be made into crystals, used as a sweetener, but the sweetness is only 1/3 of sucrose. maltose is a cheap nutritious food, easy to be digested and absorbed by the body. Maltose has aldehyde group in its molecular structure, which is a reducing sugar with reducing properties. Therefore, it can react with silver ammonia solution to produce silver mirror reaction, and can also react with freshly made alkaline copper hydroxide to produce brick red precipitate. It can be hydrolyzed under certain conditions to produce 2 molecules of glucose.