Olaplex No 4P Blonde Enhancer Toning Shampoo is a highly concentrated purple shampoo that 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