"Cindy Fuller" > wrote in message
> Not that simple for those of us in the northern climes, Ed. The UVB
> rays that are needed to synthesize vitamin D in the skin are filtered
> out by the ozone layer during the winters, which may last up to 6
> months. Add to that sunscreen, skin pigmentation, and reduced ability
> to make vitamin D with aging and you have a lot of folks walking around
> with low vitamin D levels in their blood. Vitamin D has very few
> dietary sources, which is why milk has been fortified with vitamin D for
> at least 50 years.

OK, but how much sour cream do you eat in a month? Probably not enough to
make a difference in your D levels if it was fortified. You may drink a
glass or three of mild a day though, or you take supplements.