The present invention relates to a method for producing an army vine leaf extract that increases the content of low molecular weight effective saponins such as ginsenoside Rg3, dipenoside L, and dipenoside LI and reduces the content of benzopyrene. Since the extract of Acacia catechu leaves according to the above-mentioned production method has the effects of increasing AMPK activity, promoting beta-oxidation, promoting glucose absorption, etc., it is effective in preventing, improving or treating diabetes, obesity, muscle loss and the like. [Selection diagram]本発明は、ジンセノサイドＲｇ３、ジペノシドＬ、ジペノシドＬＩなどの低分子有効サポニンの含有量を増大しかつベンゾピレンの含有量を低減させるアマチャヅル葉抽出物の製造方法に関する。前記製造方法によるアマチャヅル葉抽出物は、ＡＭＰＫ活性増加、ベータ酸化促進、ブドウ糖吸収促進などの効能を示すので、糖尿、肥満、筋損失などの予防、改善又は治療に効果がある。【選択図】 図４
