Solving a biological puzzle: How stress turns your hair grey

middle-aged woman with grey hair

For a long time, anecdotes have connected stressful experiences with the phenomenon of hair greying. Now, for the first time, scientists have discovered exactly how the process plays out. Stress activates nerves that are part of the fight-or-flight response, which in turn cause permanent damage to pigment-regenerating stem cells in hair follicles. The study, published … Read more