Black cohosh is a perennial plant native to North America. Its rhizomes (underground stems) and roots are harvested to make herbal preparations. Indigenous peoples have used it for centuries, and today it’s one of the most popular herbal remedies for women’s health.

Most common use. May reduce hot flashes, night sweats, mild mood swings, and sleep disturbance. Evidence is mixed but several trials support modest benefit, especially for hot flashes.