Olaplex Nº.4P strengthens, softens, and neutralises unwanted yellow tones for brighter, more manageable hair | The sulfate-free, highly concentrated formula allows for customisable toning - the longer you treat, the brighter the results. Containing Olaplex' our patented technology, it repairs, hydrates and brightens while being gentle enough to use as often as needed | Great for all hair textured |Suited to blonde or grey hair |

Scientifically Proven:

3x Brighter*