Is there a way to kill hair pigment cells causing your hair to grow out white?

A certain amount of extreme cold can destroy the piment in your hair.

They do the same to cows and cold branding.

It probably hurts them like crazy and they get bald on the spot, but afterwards, white hair grows.

I don't know what the effects will be to the blood vessels on your head and you can get permanent skin damage if you do it too long.