There is absolutely no comparing the lactose digestion of a breastfed baby to that of a formula fed baby since manufactured formulas never have the many other compositional features of breast milk. The first source of carbohydrates in breastmilk is lactose. You could find several different different types of speciality https://nutramigeninfantformula57912.tnpwiki.com/5085316/fascination_about_baby_formula