Brazil Do banks have metal or melanin detector doors?

So, it's wonderful. We evolved this very protective, wonderful covering of melanin.

A common example of these include ink from tattoos and freckles (melanin) in skin samples.

Melanin is considered the primary chromophore for all hair removal lasers currently on the market.

So melanin was recruited, in our lineage, and specifically in our earliest ancestors evolving in Africa, to be a natural sunscreen.

Melanin, in various forms, has probably been on the Earth a billion years, and has been recruited over and over again by evolution, as often happens.

So, living at the equator, we got lots and lots of ultraviolet radiation and the melanin this wonderful, complex, ancient polymer compound in our skin served as a superb natural sunscreen.

Dark skinned people may be less efficient at making vitamin D because melanin in the skin hinders vitamin D synthesis however, a recent study has found novel evidence that low vitamin D levels among Africans may be due to other reasons.