Hair going gray? Science may finally have figured out why, and it may have to do with 'stuck' stem cells.
April 20, 2023 – Your hair has stem cells near the roots, and they are important in making your hair brown, black, or another natural color. But these cells need to move to a different part of the follicle and change to produce hair color. When these special stem cells get “stuck” and can no longer do their job, gray hair comes out instead, new research reveals.
The traditional belief was stem cells stay primitive, mature when needed, and then die off. Now it’s believed to be more of a cycle. Now that investigators have figured out how gray hair might get started, a next step will be to search for a way to stop it. “Our study suggests normal melanocytes are very plastic and can reverse a differentiation state. Melanoma cells are known to be very plastic,” Ito said. “We consider this feature of melanoma may be related the high plasticity of original melanocytes.”
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