Not sure if this is the right category (I'm new to this kind of thing).
I've recently just moved my 6.5mo on to aptamil stage 2 follow on milk. I didn't really research as my close friend advised me to use it and told me it wouldn't be made if it wasn't meant to be used. However another friend yesterday told me it's bad for their teeth, can make them constipated, not needed and I should of kept him on the first milk. Now I have researched and most people adcise to stay on the stage 1 milk. I now feel bad for changing before research. Does it make a difference which one I use? Should I change him back to stage one?