what is lactose used for
Lactose intolerance is the inability to digest a sugar called lactose that's found mainly in milk and dairy products. Normally, the small intestine produces an enzyme called lactase, which breaks down lactose into two simple sugars, glucose and galactose, that can be absorbed into the bloodstream.actose intolerance is the inability to digest a sugar called lactose thatâs found mainly in milk and dairy products. Normally, the small intestine produces an enzyme called lactase, which breaks down lactose into two simple sugars, glucose and galactose, which can be absorbed into the bloodstream.