PROBLEM TO BE SOLVED: To provide oral compositions in which temporal stability of oleuropein is excellent and further the strong bitter taste derived from oleuropein is eliminated.SOLUTION: The invention relates to: oral compositions that have an excellent oleuropein degradation inhibitory effect at the time of high temperature in an aqueous solution, particularly an excellent degradation inhibitory effect of oleuropein after being subjected to high temperature, while eliminating the bitter taste derived from oleuropein by encompassing oleuropein or oleuropein-containing plant extract into liposome to a method for inhibiting oleuropein degradation and to a method for reducing bitter taste derived from oleuropein.SELECTED DRAWING: NoneCOPYRIGHT: (C)2016,JPO&INPIT【課題】オレウロペインの経時安定性に優れ、さらにオレウロペイン由来の強い苦味を消失させた経口組成物の提供。【解決手段】オレウロペインまたはオレウロペイン含有植物抽出物をリポソームに包含させることにより、オレウロペイン由来の苦味を消失させると共に、水溶液中での高温時のオレウロペイン分解抑制効果、特に高温に晒された後のオレウロペインの分解抑制に優れた経口組成物、および、オレウロペインの分解を抑制する方法およびオレウロペイン由来の苦味を抑制する方法。【選択図】なし
