“Does my breastfed baby need vitamin D? My pediatrician says I should give my 4-month-old a vitamin D supplement. What should I do?”

The short answer is yes.  However, there is a lot more to it.  Parents sometimes assume that they will need to supplement their baby with additional Vitamin D because human milk is deficient in Vitamin D.  This is usually what they are told.  Nothing could be further from the truth.  The truth is human milk does have Vitamin D, but it is rarely enough for both the parent and the baby.  There are many variables to consider about this as well.  The most efficient way we get Vitamin D is from the sun.  Was your baby born during winter months(not that we recommend having your newborn out in the sun anyway)?  Do you live in a colder climate?  Do you or your baby have darker skin color?  All of these things can affect how much Vitamin D you and your baby are exposed to.  If you are breast/chest feeding and you are deficient in Vitamin D, the chances are good your baby is as well.