[Noxmiles]

In Germany (probably in most european countries) it's not allowed to add vitamin D to food. So it's really important to know about it.

Still, almost no one knows about it...

[sandos]

Vitamin D is added to milk and butter in Sweden, even obligatory for some kinds! But that's because of our sad lack of sunshine for many months on end of course, so I expect the other nordic countries does something similar.