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Solving a biological puzzle: How stress causes gray hair: Scientists uncover link between the nervous system and stem cells that regenerate pigment Science DailyStress speeds up hair greying process, science confirms The GuardianLink between stress and hair turning prematurely gray revealed in animal study CNNLink Between Stress And Hair Turning Prematurely Gray Revealed In Harvard Study CBS BostonScientists discover 'why stress turns hair white' BBC NewsView full coverage on Google News