Even though purple shampoo isn't a dye, but a neutralizer to get rid of the yellow in your hair, if you let your hair be exposed to its formula for too long, ...

How Often Should I Use Purple Shampoo? Keep in mind that purple shampoo does not replace your regular shampoo and should only be used once or twice a week. ...

Even though purple shampoo isn't a dye, but a neutralizer to get rid of the yellow in your hair, if you let your hair be exposed to its formula for too long, ...