Why do breastfed babies need vitamin D drops?

Breast milk is amazing, but it doesn't have enough vitamin D for your baby's needs. Vitamin D is important for bone health and preventing rickets. That's why pediatricians recommend giving breastfed babies 400 IU of vitamin D daily. Formula is fortified with vitamin D, so if your baby drinks about 32 ounces a day, they usually get enough from that. My advice would be to talk to your pediatrician, especially if your baby isn't getting outside much or you live in a place with limited sunlight.