L'Oréal Professionnel Metal Detox harnesses the power of Glicoamine, a molecule so small it can penetrate the hair fiber and "detoxify" it by neutralizing the metal inside. The concentration of metal inside the hair fiber varies depending on hair porosity and water quality; in excess, metal can cause breakage and unreliable color results, making it harder to maintain color-treated hair. That is where L'Oréal Professionnel Metal Detox comes in, neutralizing the metal in order to ensure that your hair color remains vibrant and true.