With dd1 she was on ferro grad and pentavite for 12 months, she was a premmie who was always throwing up and she had weight problems. Dd2 was fully bf and we were advised not to use supplements. With ds I was low in vitamin k and my ob recommended pentavite but my gp and pead said there was no need, even on formula as it has all the nutrients he needs. There seems to be a trend towards supplements jic, but I don't see the point, we only use the with dd1 if she is sick and refusing to eat. (dd2 loves her food so it's never an issue with her)