Synopsis

Source of validity: Traditional
Rating (out of 5): 2

Cohosh—specifically, black cohosh (Actaea racemosa, formerly Cimicifuga racemosa)—has been used traditionally in Native American and early Western herbal medicine to address various women’s health concerns, including scanty menstruation (oligomenorrhea). Historical records indicate that indigenous peoples used black cohosh root as a gynecological aid, and 19th-century eclectic physicians in America adopted the herb for menstrual irregularities and menopausal symptoms. The traditional rationale is based on the belief that black cohosh acts as a “female tonic,” supporting uterine health and promoting menstrual flow.

However, modern scientific evidence supporting the use of cohosh for scant menstruation is limited. Most clinical research focuses on its effects in relieving menopausal symptoms, such as hot flashes, rather than in treating oligomenorrhea or increasing menstrual flow. The herb contains triterpene glycosides and other compounds, but their specific effects on menstrual regulation have not been rigorously studied in clinical trials. Thus, while the use of cohosh for scant menstruation is well-documented in traditional herbal medicine, there is little scientific validation for this practice. The rating of 2 reflects strong traditional use but minimal supporting research evidence.

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