L’ORÉAL PROFESSIONNEL METAL DETOX PRE SHAMPOO TREATMENT 250MLThis pre shampoo treatment is highly concentrated with 2% Glicofiller, an active ingredient that targets both the surface and cortex of the hair. This helps to prevent excessive absorption of water and metals. On the surface, the treatment forms a protective coating for the hair strands and fills in 1 million micro breaks with just one use. At the core, it effectively penetrates and replenishes the hair down to the cortex level.