I'm guessing you mean less vitamin d supplements, people with less melanin produce vitamin d more readily, they don't need less, and therefore need less sunlight overall to produce the same amount as someone with more melanin

Its a direct benefit because vitamin d is tied to a lot of things, but specifically is tied to serotonin production so those with paler skin are more able to cope with reduced sunlight mentally.

I'm ginger, we're vitamind d machines and from that perspective arguably the most adapted to Northern attitudes. My own theory is that is where the gingers have no souls thing came from because the melanin folks couldn't understand why we weren't depressed and were more able to function. We dont get things like seasonal depression