Likely due to iron. Iron will also cause black stool or constipation to an adult. You may consult your paediatrician at next visit. Just curious, are the multivitamin and iron drops advised by the paediatrician?
I think it's fine coz of the iron but you may want to bring this up to the pediatrician during your next visit.
I was told by PD that the iron drops will make baby’s poop black and it’s normal.
https://sg.theasianparent.com/baby-poop-guide
Anonymous