Yoshinori Okamoto   Takao Tobe   Koji Ueda   Tatsuyuki Takada   Nakao Kojima   
The Journal of toxicological sciences 40(2) 235-42 2015年4月
Propolis, a natural product derived from plants by honeybees, is a mixture of several hundred chemicals, including flavonoids, coumaric acids, and caffeic acids, some of which show estrogen-like activity. In this study, the estrogenic activity of ...