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Fifty (or More) Shades of Gray: Gene for Graying Hair Identified

They may not have settled the enduring debate over whether gray hair makes a person look distinguished or just plain old, but scientists have identified for the first time a gene behind graying hair. Researchers said Tuesday an analysis of DNA from more than 6,300 people from five Latin American countries enabled them to pinpoint a gene that affects a person's likelihood of getting gray hair. The gene, called IRF4, is involved in regulating melanin, the pigment responsible for hair...

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