Fecha de publicación: 17/02/2022 Fuente: WIPO "olive oil" The present invention relates to an active ingredient composition for the care and surface modification of human hair. In particular, the invention relates to a cosmetic composition for treating a keratinous material comprising a) at least one organic silicon compound and b) a sulfated and/or sulfonated fatty acid ester, the cosmetic composition being particularly suitable for caring for damaged hair.