Some people aren't happy when they spot gray hairs; many take measures to hide them. Based on a Garnier-commissioned 2021 survey of 2,000 women (via Salon Today ), 33% used at-home hair color kits in 2020. Of those women, 85% were motivated by the opportunity to send away the gray. But banishing gray hairs with chemical products may not always be necessary, according to a 2023 study in Nature .

After examining melanocyte stem cells (the ones involved in hair pigmentation and growth) in mice, the authors observed cases in which the stem cells causing gray hair were getting interrupted and skipping a hair follicle development step. When they were modified to return to their regular routine, pigmentation reappeared. Lead author Dr. Qi Sun told Earth that the conclusions present "a pot

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