No.4P Blonde Enhancer Toning Shampoo - OLAPLEX No. 4P Blonde Enhancer Toning Shampoo cleanses, tones and repairs while keeping hair hydrated from roots to ends. This highly-concentrated, sulfate-free shampoo forms a rich lather to neutralize brassiness and boost brightness after one use.BenefitsOLAPLEX products are thoroughly tested in accordance with industry standards in-house and by independent third-party laboratories for safety and efficacyFor All Hair TypesStrengthens, hydrates and neutralizes brassinessSuited for all blonde, lightened and grey hairPH BalancedContains OLAPLEX patented bond building technology that rebuilds broken and weakened bondsResearch ResultsScientifically Proven: 3x Brighter compared to top purple shampoosFormulated WithoutFormaldehydeNutsPhthalatesDEAParabensGlutenPhosphatesAldehydesSulfates - No.4P Blonde Enhancer Toning Shampoo