[dombesz]

You are already adapted to the climate of Sweden, meaning you have a lighter skin and your body uses sunlight more efficiently, because it's scarce. This is epigenetics in action. This could be problematic for people who originate from a more sunnier climate and have moved closer to the poles in the hemisphere, or to people who don't go outside. Their body expects more sunlight, however they get less, which could trigger more fat storage.

[strken]

How do we know it's epigenetic? Is there a way to tell?

[dombesz]

I think to a certain degree we can adapt to the amount of sunlight at a young age, or even in the womb. Just as we do for food scarcity, see the Dutch winter famine [1]

This article seem to point into the direction of epigenetics. [2]

- [1] https://www.nytimes.com/2018/01/31/science/dutch-famine-gene...

- [2] https://geneticliteracyproject.org/2016/10/17/black-white-tw...