[Gondring]

From the info I've seen, milk naturally contains little Vit D...that's why it is fortified..though I suppose it would help supplement other things in the diet.

[muawiyah]

Vitamin D appears to be one of those things you just can't get enough of ~ infants need supplemental amounts from their mothers. Adults living in higher latitudes need more of it since they get less sunlight.

However little there is, you can use it.