The L'Oreal Professionnel Metal Detox Preshampoo Treatment is an intensive pre-wash step designed to neutralize metal particles within the hair fiber. This innovative formula works to remove buildup caused by hard water and environmental stressors, preparing the hair for subsequent coloring or lightening services. By eliminating metal deposits, this treatment helps prevent breakage and ensures color results are more vibrant and true to tone. It is an essential preparatory step for maintaining hair health and optimizing styling outcomes.