Medically reviewed by Melissa Nieves, LND Evening primrose has been studied for conditions related to menstruation and ...

Examples include soybeans, B vitamins, evening primrose oil, and dong quai. Estrogen and progesterone are two major sex hormones in the human body. Estrogen is responsible for sex characteristics ...

Some research suggests evening primrose oil may have a positive effect on menopause-related hot flashes, but other studies suggest no effect. Speak with your doctor before trying it for their advice.