Why do so many Irish people have red hair?



  1. 0 Votes

    The Irish population is made of a significant amount of redheads (10%), but Scottish people actually contain more (13%). Just a fun fact.

    Anyways, red hair is caused by a presence of a high level of pigment called pheomelanin. Eumelanin is the pigment that causes dark hair. Just the right combination of a high level of pheomelanin and a low level of eumelanin will cause a person to have red hair. This combination is actually determined by genes, specifically the melanocortin-1 receptor (MC1R), a recessive gene that just happens to be prevalent among Irish and Scottish people.

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