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The latest research indicates that the greying occurs when certain migrating cells get stuck in the hair follicle. This also suggests greying can be reversible,
by r2_pilot 2y ago
The latest research indicates that the greying occurs when certain migrating cells get stuck in the hair follicle. This also suggests greying can be reversible, which I know from experience as I have plucked hairs which are grey at the tip and colored at the base.