eli5: If more melanin is advantageous in warm climates, why is less of it advantageous in colder climates? Wouldn’t darker skin still be most advantageous in cold climates where it might occasionally be hot?

Question

eli5: If more melanin is advantageous in warm climates, why is less of it advantageous in colder climates? Wouldn’t darker skin still be most advantageous in cold climates where it might occasionally be hot?

In: 1641

Answer 1

Holy shit I’m reading this thread as a guy who gets frequent migraines. Was recently in Mexico, and thought I was so lucky and it was so great that I was not suffering from headaches. I think I have a vitamin D deficiency.