Saturday, November 17 2018
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Can stress turn your hair grey?

Can stress turn your hair grey?

Is it scientifically possible for hair to turn white overnight (canities subita)? Is there a physiological process through which extreme stress can cause hair to change colour this fast? Unfortunately no ethics committee is going to let researchers induce a sufficiently terrifying experience in a lab volunteer to help us understand whether sudden changes in hair colour and thickness are possible.