What can I do to get rid of grays!!!

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They keep popping out like crazy and I have black hair (in my pic it was highlighted so it didnt show grays but I cant always highlight my hair as it damages horribly with black hair). I'm 38 (started around 36 i would say) for goodness sakes! I got it colored again a week before Thanksgiving. Really? Do I have to color it every 6 weeks to keep it hidden.

Posted more for fun as I dont think there is anything but maybe someone knows a myth? HEHE

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