Dong quai is a medicinal plant that belongs to the same family of plants as celery, carrots and parsley, states Mayo Clinic. The plant may be able to treat several health conditions in women, such as menstrual cramps and anemia associated with menstruation.
Preliminary research suggests that dong quai has a weak estrogen-like effect on the body, according to Mayo Clinic. Practitioners of the herb state that it helps nourish blood and balance a person's energy, and they sometimes use it to treat conditions of the liver and spleen. However, as of 2015, research is still ongoing, and there is little scientific evidence to back up any medicinal claims of the herb.