What Causes Gray Hair?

Genetics And Premature Gray Hair

Premature graying is largely an issue of genetics. Several studies have found a link between genetics and premature gray hair, identifying some genes responsible for the melanin loss. The primary gene that causes gray hair was identified as IRF4, the same gene responsible for light hair in individuals of European descent. This gene is responsible for producing and regulating melanin. As hair turns gray, this gene causes even lower productions of melanin. Researchers are still trying to identify which genes are to blame for premature graying in an individual's twenties although one thing is sure: if someone's parents or grandparents went gray prematurely, they probably will too. Along with genes, ethnicity and race play a role in how soon an individual's hair will likely turn gray. African Americans tend to notice gray hairs beginning at forty years old whereas whites notice graying around thirty-five years old.

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