Scientists figured out why stress turns your hair gray

It might not come as a shock to learn that stress can turn your hair gray, but a team of Harvard scientists recently discovered the surprising reason why. Scientists have long understood that gray hair is the result of the natural aging process, certain pigment/follicle disorders, and stress. But until now, we’ve never known exactly what role stress plays in causing gray hair. Previous theories have insisted that stress somehow accelerates the aging process or triggers an autoimmune respo