Lactose is a disaccharide made up of one glucose and one galactose (which lactase splits up). The galactose IMO is actually worse for you because like fructose,

Lactose is a disaccharide made up of one glucose and one galactose (which lactase splits up). The galactose IMO is actually worse for you because like fructose, it's transported and phosphorylated in the liver whereas glucose can be metabolized anywhere in your body.