Cool Can Hair Turn Gray Overnight Ideas. A new study offers quantitative evidence linking psychological stress to graying hair in people. The length of the anagen phase varies according to your genes and certain hormonal levels.

Web it can be exacerbated by stress, which could account for the association of white hair with terrifying experiences. Web legend has it that marie antoinette’s hair turned gray overnight just before her beheading in 1791. Our expert daniel nettle teases out the truth from the myth.