For many years, gray hair was believed to be a one-way marker of aging. Today, new scientific findings suggest that this isn’t always the case. Researchers have discovered that under certain circumstances, gray hair can regain its original color, challenging long-held assumptions and opening new directions in aging and hair biology research.
What causes hair to turn gray?
Hair turns gray when melanocytes—the cells that create melanin, the pigment responsible for hair color—lose their ability to function properly. This decline can happen due to several factors:
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Aging: As time passes, melanocytes naturally slow down melanin production.
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Long-term stress: Persistent stress accelerates cellular damage and pigment loss.
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Genetics: Your DNA plays a major role in determining when graying begins.
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Nutrient shortages: Deficiencies in vitamin B12, copper, or iron may contribute to early graying.
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