Does copper deficiency cause gray hair?

Copper deficiency is not known to be directly associated with gray hair, but it may contribute to the process. Copper is an essential mineral involved in many bodily functions, including the formation of melanin, the pigment that gives hair its color. Sufficient copper levels are necessary for the synthesis of melanin, and a deficiency may lead to premature hair graying. However, copper deficiency is rare, and gray hair has numerous causes, including genetics, aging, stress, and certain medical conditions.