I have avoided hvs with my second child but went to an 8 months check (for the free books! and to see quite how porky my baby was) and she went on about it was government advice that mothers who bf after 6 months need to give vitamins a c and d. I vaugely remember something about this and iron the first time round. If they are eating well is it necessary? I looked in my chemists and the abidec ones had peanut oil in them.