Black cohosh is a flowering plant native to the eastern regions of the United States and Canada. It is scientifically known as Actaea racemosa and Cimicifuga racemosa, and is also referred to as black bugbane, black snakeroot, baneberry, or bug root. Traditionally used in Native American medicine, its flowers and roots are now commonly included in women's health supplements for menopause symptoms, fertility, and hormonal balance. For instance, Remifemin, a well-known women's health supplement, features black cohosh as a key ingredient. Black cohosh is thought to be effective because it acts as a phytoestrogen—a plant compound that emulates estrogen's effects. However, whether it can be considered a true phytoestrogen is subject to debate. Regarding fertility, some earlier, smaller studies suggested that black cohosh, when used with clomiphene citrate (Clomid), might aid those with unexplained infertility or PCOS-related fertility problems by increasing the likelihood of ovulation and pregnancy. Yet, more recent research does not support these findings. Additionally, black cohosh might help regulate menstrual cycles in women undergoing fertility treatments like Clomid, but further research is necessary for confirmation. In the case of fibroids, a three-month study involving 244 postmenopausal women indicated that daily supplementation with 40 mg of black cohosh could reduce uterine fibroid size by up to 30%. As for PMS and PMDD, despite online claims, there is no significant evidence that black cohosh provides relief. Concerning cancer, black cohosh exhibits some estrogenic activity, suggesting it may act like estrogen.