My son is 3 now & started drinking cows milk at 12months & still loves it. I don't see the point in follow on formula milk. If your child has a healthy balanced diet with lots of fresh fruit & veg, dairy & meat he should be getting all the vitamins & minerals he needs that way, why would he need any extra from follow on milk? Companies like SMA, Aptamil etc just want to sell you an extra product, an expensive one aswell & make you believe you need it!