【Menstrual problem (premenstrual syndrome (PMS) and dysmenorrhea) is a common gynecological complaints among women in reproductive age. The aim of this study was to compare the effects of isoflavone and Cynanchum wilfordii for improvement of premenstrual syndrome, dysmenorrhea. Subjects were 30 college women in Busan, divided into three groups (CG; control group, n=10; IS group; isoflavone supplement group, n=10; CS group; Cynanchum wilfordii supplement group, n=10). They showed 5.0 or higher for menstrual pain when tested by the VAS. IS group was allocated a isoflavone pill (500 mg/day) for 8 weeks, and CS group was allocated a Cynanchum wilfordii pill (6 g/day) for 8 weeks. We administered a menstrual distress questionnaire (MDQ), and visual analogue scale(VAS). There were no differences among the three groups in general characteristics, nutrients intake, MDQ, or VAS. In the CG group, there were no differences in MDQ, or VAS after 8 weeks. In the IS group, negative emotions, behavioral changes, concentration, pain, autonomic nervous system response, water retention, and skin changes significantly improved (P】