We've known for a very long time vitamin D is produced when the skin is exposed to UV light. We've known how important vitamin D is. Northern Europe dark and cold, yep we've known that too for a while.
Innuit get their vitamin D from the seafood based diet, we've also known that too. Northern Europe being unusually warm thanks to the gulf stream, that is also old news.
We've known for a very long time vitamin D is produced when the skin is exposed to UV light. We've known how important vitamin D is. Northern Europe dark and cold, yep we've known that too for a while.
Innuit get their vitamin D from the seafood based diet, we've also known that too. Northern Europe being unusually warm thanks to the gulf stream, that is also old news.