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P4 Blonde Enhancer Toning Shampoo - the perfect solution for achieving and maintaining beautiful, vibrant blonde hair!Formulated with Olaplex's patented bond-building technology, this toning shampoo not only neutralizes unwanted yellow and orange tones in blonde hair, but also strengthens and repairs damaged strands from within..P4 Blonde Enhancer Toning Shampoo is the perfect addition to your hair care routine.P4 Blonde Enhancer Toning Shampoo gently cleanses and nourishes your hair, leaving it soft, silky, and full of radiant shine.