People have long thought that too much stress can turn their hair gray. Now, Harvard University researchers say they know why this happens. They found that a stress produced hormone can cause stem cells, which convert into pigment or color cells for hair follicles, to overproduce and drain the supply of cells that were to produce color for future hair follicles.
Science in a Minute 012720 New Evidence That Too Much Stress Can Turn Your Hair Gray That Too Much Stress Can Turn Your Hair Gray
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