Dong QuaiProduct Description Dong Quai has been used in China for thousands of years as a beneficial herb in tonics for the blood, especially for women. It is believed to contain nutrients that have a positive effect on the glands that produce female hormones.* Dong Quai has a long history of use by menopausal women to help decrease the symptoms and severity of hot flashes.* It helps alleviate the common symptoms of premenstrual syndrome (PMS), such as