Lactose is a disaccharide sugar derived from galactose and glucose that's found in milk.
Galactose: This is a monosaccharide sugar that's less sweet than glucose and fructose. It's a component of lactose.
This is an enzyme that catalyzes the hydrolysis of lactose to glucose and galactose.
Dairy Products: These are food products made from milk. They're rich in lactose.