Breastfed infants will need extra vitamin D beginning around 6-8 weeks old. This can be given as Tri-Vi-Sol or Poly-Vi-Sol, which can be purchased over the counter. The dose is 1.0 ml per day.

 

An easy and safe way to give the vitamins is to place an empty nipple in the infant's mouth. Drop the liquid inside the nipple; your baby will suck it down at his/her own rate. Or you can nurse your baby immediately after giving the liquid through the dropper.

 

Formula fed infants should not need a vitamin.