Formulated with a very mild emulsifying, softening and volume enhancing base. Klorane's centaurea extract prevents the yellowing process of white or grey hair. It acts by restoring radiance in the hair by adding silver highlights thanks to the cyanocentaurein it contains. These are only highlights as the effect is external and this product does not contain any synthetic colouring agents. Use: One application is enough. Rinse thoroughly. Suitable for frequent use.