Olaplex No.4P Blonde Enhancer Toning Shampoo

Highly concentrated purple shampoo cleanses, tones, and repairs while keeping hair hydrated from roots to ends. Sulfate-free formula creates a rich lather to neutralize brassiness and boost brightness after one use for all blonde, lightened, and grey hair.

Scientifically Proven:
3x Brighter*
*Compared to top purple shampoos

How to Use:
Apply to wet hair, lather fully, and let process.
2-3 times per week or as often as needed to neutralize unwanted brassiness.