Fuente: WIPO "olive oil" The present invention relates to an olive oil enriched with oleanolic acid that comprises a concentration of oleanolic acid between 580 and 650 mg/kg. This functional olive has proven to be effective in the treatment and prevention of type 2 Diabetes Mellitus and pre-diabetes. Also, the invention relates to a process for the preparation of said functional olive oil enriched with oleanolic acid.