The present invention is an anti-obesity agent or a glucose tolerance improving agent comprising a Bifidobacterium bacterium as an active ingredient, wherein the Bifidobacterium bacterium has a conversion rate from 10% or less of linoleic acid to conjugated linoleic acid It is related with the said anti-obesity agent or a glucose tolerance improving agent etc. characterized by having. ADVANTAGE OF THE INVENTION According to this invention, the anti-obesity agent and glucose tolerance improving agent which were effective in the prevention or treatment of obesity, or improvement of glucose tolerance, and were excellent also in safety, and the food / beverage products containing them can be provided. In addition, according to the present invention, Bifidobacterium bacteria, particularly Bifidobacterium breve, and a pharmaceutical composition containing the same, which are effective in preventing or treating obesity or improving glucose tolerance, and having excellent safety. Things can be provided.本発明は、ビフィドバクテリウム属細菌を有効成分とする抗肥満剤又は耐糖能改善剤であって、前記ビフィドバクテリウム属細菌は、１０％以下のリノール酸から共役リノール酸への変換率を有することを特徴とする、前記抗肥満剤又は耐糖能改善剤等に関する。本発明によれば、肥満の予防若しくは治療又は耐糖能の改善に有効で、安全性にも優れた抗肥満剤及び耐糖能改善剤並びにそれらを含有する飲食品を提供することができる。また、本発明によれば、肥満の予防若しくは治療又は耐糖能の改善に有効で、安全性にも優れた、ビフィドバクテリウム属細菌、特にビフィドバクテリウム・ブレーベ及びそれを含有する医薬組成物を提供することができる。
