PROBLEM TO BE SOLVED: To provide an oral composition for maintaining health of the gum and the gingiva by suppressing and inhibiting absorption of alveolar bone, and to provide an oral composition for prevention, treatment, or improvement of periodontitis.SOLUTION: The invention provides an oral composition for maintaining health of the gum and the gingiva, containing, as an active ingredient, at least one kind selected from Oleuropein which is a polyphenol glycoside contained a lot in Olea europaea plant (e.g., olive) leaf and the like, and degraded products thereof and an oral composition for prevention, treatment, or improvement.COPYRIGHT: (C)2015,JPO&INPIT【課題】歯槽骨の吸収を抑制・阻害することによる、歯茎・歯肉の健康維持用の口腔用組成物、及び歯周病の予防、治療又は改善用の口腔用組成物の提供。【解決手段】モクセイ科オリーブ属植物(例えばオリーブ)の葉などに多量に含まれるポリフェノール性配糖体であるオレウロペイン及びその分解物から選ばれる少なくとも1種を有効成分として含む、歯茎・歯肉の健康維持用の口腔用組成物、及び歯周病の予防、治療又は改善用の口腔用組成物。【選択図】なし
