May be not directly the lactase, but the split' lactose. Lactose is split into (milk) sugar by lactase enzyme. Lacto-free milk is sweeter than whole milk. So, i

May be not directly the lactase, but the split' lactose. Lactose is split into (milk) sugar by lactase enzyme. Lacto-free milk is sweeter than whole milk. So, it's the same problem with as with all sugars.