Can a gray beard be replaced by black scalp hair
https://healthell.blogspot.com/2021/11/can-gray-beard-be-replaced-by-black.html
Scalp hair is often used as a donor source for beard hair. If you would use black hair as a filler, it would bring the black hair into the beard. Sooner or later, these black (or brown) hairs may turn gray. There is no guarantee that your re-transplanted scalp hair in the beard location wouldn’t turn gray again sooner or later. I believe that your question is academic because no doctor I...
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