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Plucking one gray hair won't make two grow back

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Your scalp is not a hydra. Plucking one hair merely empties a single follicle. It has zero biological impact on the surrounding follicles, which operate entirely independently. What actually happens is that plucking the hair repeatedly traumatizes the follicle to the point where it might just stop growing hair altogether. So instead of a head full of gray hair, you'll just end up with a patchy, bald head.

Plucking one gray hair won't make two grow back
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