Olaplex No. 4P Blonde Enhancer Toning Shampoo is a purple shampoo designed to cleanse, tone, and repair blonde, lightened, and gray hair while neutralizing brassiness and boosting brightness. It's a sulfate-free, highly concentrated formula that aims to repair damage, hydrate, and soften hair, leaving it 3x brighter than other purple shampoos. The shampoo is clinically proven to reduce brassiness, boost brightness, and maintain hair hydration
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