Scientists say they may have discovered why stress makes hair turn white, and a potential way of stopping it happening without reaching for the dye (Readers may find some of the details distressing). In experiments on mice, stem cells that control skin and hair colour became damaged after intense stress. In a chance finding, dark-furred mice turned completely white within weeks. The US and Brazilian researchers said this avenue was worth exploring further to develop a drug that prevents hair colour loss from ageing.
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