PROBLEM TO BE SOLVED: To provide a carbohydrate composition and a food and beverage that are slowly digested and absorbed in the small intestine once ingested, give a gradual rise in blood glucose levels, as well as have as low osmotic pressure as possible.SOLUTION: There have been made new findings that a carbohydrate composition in which highly branched dextrin and isomaltulose are mixed at a specific ratio, wherein the highly branched dextrin has a structure in which glucose or isomaltooligosaccharide is bound to a non-reducing terminus of the dextrin via an α-1,6 glycosidic bond, and has a DE value of 10-52, enhances a suppressing effect on digestion of the highly branched dextrin by isomaltulose, that is, synergistically suppresses the digestion, and leading to the completion of the invention.COPYRIGHT: (C)2013,JPO&INPIT【課題】摂取後の小腸での消化吸収が遅く、血糖値の上昇が緩慢であり、しかも浸透圧が出来るだけ低い糖質組成物及び飲食品を提供することを課題とする。【解決手段】デキストリンの非還元末端に、グルコース又はイソマルトオリゴ糖がα-1,6グルコシド結合で結合した構造を有し、且つDEが10-52である高分岐デキストリンとイソマルチュロースを特定の割合で混合した糖質組成物ではイソマルチュロースによる高分岐デキストリンの消化抑制効果が高くなる、すなわち消化が相乗的に抑制されるという新規な知見を見出し、本発明の完成に至った【選択図】なし