Metal inside the fiber creates both a risk of breakage and negatively impacts color results during colour, balayage and lightening services. The level of metal in hair varies, depending on hair porosity and on the water quality where we live. The L'Oréal Professionnel Metal Detox metal neutraliser pre-treatment neutralises metal inside the fiber and protect it before color, balayage or lightening services. It maintains color vibrancy with insense shine. This internationally patented technology is enriched with Glicoamine a molecule small enough to penetrate and neutralise metal inside the fiber. For optimal results, use after your Metal Detox in-salon service to prevent new metal deposits. L’Oréal Professionnel is striving towards an ever more responsible and sustainable business model, transforming activities to respect the planet’s limits.100% recycled plastics are now prioritised in the manufacturing of the Serie Expert bottles, reducing the use of virgin plastics.The Serie Expert collection is produced in a facility that has been carbon-neutral since 2015, and has implemented a water recycling loop that has reduced water usage by 47% since 2005. Features Neutralises metal particles inside the fiber More reliable colour result Minimises breakage during colour, lightening and balayage services Color is homogeneous, lasts longer and is intensely shiny.