Fecha de publicación: 23/06/2004 Fuente: WIPO "olive oil" The present invention relates to a method for industrially efficiently preparing an oil and fat composition containing oleanolic acid, maslinic acid, physiologically acceptable salts thereof and derivatives thereof, wherein the method comprises the step of extracting olive plants and/or a by-product obtained in an olive oil-manufacturing process with an organic solvent or a water-containing organic solvent.