Phaseolus vulgaris seed extract is disclosed, which is prepared by the following steps: (a) grinding the Phaseolus vulgaris seeds to obtain Phaseolus vulgaris powder； (b) using a first solvent to dissolve the Phaseolus vulgaris powder to get a homogeneous Phaseolus vulgaris extract； (c) and centrifuging the homogeneous Phaseolus vulgaris extract and collecting Phaseolus vulgaris extract supernatant； wherein in the step b), roughly one gram of Phaseolus vulgaris powder is dissolved in 10 ml of first solvent for extraction.一種花豆(Phaseolus vulgaris L.)種子萃取物，係以包含以下步驟之方法製得：a)研磨該花豆種子以獲得一花豆粉末；b)使用一第一溶劑溶解該花豆粉末以獲得一均質花豆萃取液；以及c)離心該均質花豆萃取液並收集一上清花豆萃取液，其中，該步驟b)係約以該花豆粉末1公克溶解於該第一溶劑10毫升的比例進行。
