Do iceland/norway/sweden/finland etc take vit d and cod liver oil and or supplement these in their foods?

[Keepdistance]

Which countries routinely take cod luver oil and vit D.
And which fortify their foods.
Uk only seem to put it in some cereals and some margarines

These countries eat a lot of oily fish.

My sister lives in Norway. In the winter months (October not about April) they all take vitamin D supplements

I think some of those countries fortify their foods, pretty sure Sweden does.

Unless its changed since I lived there Sweden does not make a big deal of Vitamin D except for babies where drops vitamin D drops are given daily until the age of 2.

I used to live in Iceland and pretty much everyone I knew took a cod liver oil supplement. The diet is also very fish based.