Process for preparing a butanolic extract originating from a biomass of aerial parts of Armeria maritima, comprising the following successive steps: - a step A 0) of harvesting said aerial parts of Armeria maritima, in order to obtain therefrom a harvest of said aerial parts; - a step A 1) of drying said harvest obtained in step A 0); - a step A 2) of milling said harvest dried in step A 1), in order to obtain a milled material of said dried harvest; - if necessary or if desired, a step A 3) of spraying the milled material obtained in step A 2), in order to obtain a powder of said dried harvest; - at least one step A) of macerating, in an aqueous-ethanolic solution with an ethanol/water volume ratio equal to 80/20, said powder obtained in step A 3, in order to obtain an aqueous-ethanolic suspension therefrom; - at least one step B) of filtering said aqueous-ethanolic suspension obtained in step A), in order to separate an aqueous-ethanolic extract therefrom; - a step C) of drying said aqueous-ethanolic extract obtained in step B), in order to obtain a dry residue therefrom; - a step D) of dissolving in water said dry residue obtained in step C), in order to obtain an aqueous phase φ 0; - at least one step E 1) of liquid-liquid extraction by bringing said aqueous phase φ 0 obtained in step D) into contact with cyclohexane in a cyclohexane/aqueous phase φ 0 volume ratio equal to 2/3, in order to obtain, after separation of the immiscible phases, a new aqueous phase φ 1; - at least one step E 2a) of liquid-liquid extraction by bringing said aqueous phase φ 1 obtained in step E 1) into contact with dichloromethane in a dichloromethane/aqueous phase φ 1 volume ratio equal to 2/3, in order to obtain, after separation of the immiscible phases, a new aqueous phase φ 2a; - at least one step E 2b) of liquid-liquid extraction by bringing said aqueous phase φ 2a obtained in step E 2a) into contact with ethyl acetate in an ethyl acetate/aqueous phase φ 2a volume ratio equal to 2/3, in order to obtain, after separation of the immiscible phases, a new aqueous phase φ 2b; - at least one step E 3) of liquid-liquid extraction by bringing said aqueous phase φ 2b obtained in step E 2b) into contact with water-saturated 1-butanol in a 1-butanol/aqueous phase φ 2b volume ratio equal to 2/3, in order to obtain, after separation of the immiscible phases, said expected butanolic extract and a new aqueous phase φ 3. - a step A 0) of harvesting said aerial parts of Armeria maritima, in order to obtain therefrom a harvest of said aerial parts; - a step A 1) of drying said harvest obtained in step A 0); - a step A 2) of milling said harvest dried in step A 1), in order to obtain a milled material of said dried harvest; - if necessary or if desired, a step A 3) of spraying the milled material obtained in step A 2), in order to obtain a powder of said dried harvest; - at least one step A) of macerating, in an aqueous-ethanolic solution with an ethanol/water volume ratio equal to 80/20, said powder obtained in step A 3, in order to obtain an aqueous-ethanolic suspension therefrom; - at least one step B) of filtering said aqueous-ethanolic suspension obtained in step A), in order to separate an aqueous-ethanolic extract therefrom; - a step C) of drying said aqueous-ethanolic extract obtained in step B), in order to obtain a dry residue therefrom; - a step D) of dissolving in water said dry residue obtained in step C), in order to obtain an aqueous phase φ 0; - at least one step E 1) of liquid-liquid extraction by bringing said aqueous phase φ 0 obtained in step D) into contact with cyclohexane in a cyclohexane/aqueous phase φ 0 volume ratio equal to 2/3, in order to obtain, after separation of the immiscible phases, a new aqueous phase φ 1; - at least one step E 2a) of liquid-liquid extraction by bringing said aqueous phase φ 1 obtained in step E 1) into contact with dichloromethane in a dichloromethane/aqueous phase φ 1 volume ratio equal to 2/3, in order to obtain, after separation of the immiscible phases, a new aqueous phase φ 2a; - at least one step E 2b) of liquid-liquid extraction by bringing said aqueous phase φ 2a obtained in step E 2a) into contact with ethyl acetate in an ethyl acetate/aqueous phase φ 2a volume ratio equal to 2/3, in order to obtain, after separation of the immiscible phases, a new aqueous phase φ 2b; - at least one step E 3) of liquid-liquid extraction by bringing said aqueous phase φ 2b obtained in step E 2b) into contact with water-saturated 1-butanol in a 1-butanol/aqueous phase φ 2b volume ratio equal to 2/3, in order to obtain, after separation of the immiscible phases, said expected butanolic extract and a new aqueous phase φ 3.