Just make sure your baby is getting some sunlight. Your baby needs very little ( 30 minutes a week I believe) to get all the vit d she needs.
"Unless your baby has special nutritional needs (for example, a tiny premie), you don't need to give vitamin supplements. When fed by a healthy mother, a healthy, full-term baby who is getting enough breastmilk does not need vitamin or iron supplements.
In the past, there has been concern about possible low levels of different vitamins and minerals in mother's milk, including vitamin D and iron. This led to the routine prescription of vitamin supplements for breastfeeding babies. Newer research has shown that sufficient amounts of these nutrients are found in human milk, in forms readily used by infants."
at 11:21 PM on Jan. 6, 2009