How Do I Hide Grey Hair?
The Best Way to Hide Grey Hair, According to Stylists
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Bring out the big guns: if you want "100 percent full grey coverage," according to Hazan, then you're going to have to dedicate a few hours to the cause. "Permanent colour has peroxide, which lightens the hair," Hazan explained. "Expect your colour to last around four to six weeks." So if you want a blissful month with zero shades of grey on your head, step right this way.