Yeah, it is. And even moreso here in the Nordics.

I take a vitamin D supplement every day. Especially in the winter.

I quickly googled and a Finnish article says that during summertime, wearing just shorts, you can get your daily amount half an hour. But that’s midsummer sun and midday.

But in countries where it’s more intense…

Anyway, supplementation is definitely necessary for most people, especially during winter.