Lactose is a disaccharide made of

Lactose is a disaccharide made of Galactose and glucose.
Lactose is a disaccharide sugar synthesized by galactose and glucose subunits and has the molecular formula C₁₂H₂₂O₁₁. Lactose makes up around 2 - 8% of milk.
The compound is a white, water-soluble, non-hygroscopic solid with a mildly sweet taste. It is used in the food industry.