Lactose is a combo molecule of glucose and galactose so it is going to affect your BG in the same way as sucrose (table sugar) that is a combo of glucose and fructose 1/2 of either is going to turn into blood sugar immediately. Sucrose and lactose are both naturally occuring and so is starch which is even worst as it turns 100% into blood glucose very fast. Just because it is natural does not make is good.
