The herb is so popular that demand is outweighing supply. Young woman in the post puberty years are prone to large hormonal swings which may lead to menstrual irregularity, painful heavy periods, acne and premenstrual syndrome. In the late teens and the twenties and thirties the hormonal imbalance of endometriosis is common and very debilitating. All of these hormonal imbalances can be reduced by eating a diet high in plant hormones. Compared with women in the United States, women in Asia are far less likely to develop cancer of the breast or uterus.
Many researchers believe that the differences in diet are one possible explanation.