Black cohosh has been used by Native North American Indians in their traditional medicine practices for various purposes, including amenorrhea and menopause. In the United States, there is evidence of the use of this herbal preparation for more than 100 years for gynecological complaints. Several studies in humans suggest that black cohosh may be safe and effective for improving symptoms of menopause, such as hot flashes, migraine headache and sleep disturbances. . However, only short-term use of black cohosh for menopausal symptoms has been evaluated. It is not clear if there are benefits in people with hot flashes caused by medications such as tamoxifen. Relief of certain menopausal symptoms may possibly be enhanced by concurrent use with hormone replacement therapy, although this is controversial. The North American Menopausal Society recommends the use of black cohosh in conjunction with lifestyle changes as an option for management of mild vasomotor symptoms. Many studies have been small and have flaws in their designs. Therefore, although this early evidence is quite promising, better studies are necessary before a strong overall recommendation can be made. Black cohosh is popular for treating symptoms of premenstrual syndrome, such as mood swings, breast tenderness, weight gain, and menstrual pain. Study of a combination product containing 60 milligrams of soy isoflavones, 100 milligrams of dong quai, and 50 milligrams of black cohosh vs. placebo showed reductions in menstrually associated migraine headaces. However, there is not enough scientific evidence to support the use of black cohosh alone for symptoms of premenstrual syndrome. Black cohosh has been used as an agent for pain and inflammation in Korean folk medicine. There is currently not enough evidence from studies in humans to support the use of black cohosh for arthritis. Although some research suggests that herbal preparations containing black cohosh may improve symptoms of rheumatoid arthritis or osteoarthritis, many other herbs have been present in these preparations. Therefore, it is not clear that any benefits are produced purely by black cohosh. We have a GMP certified extract factory to produce all kinds of herbals extract. We possess a complete set of advance equipment for extraction,refinement,column chromatoraphy,condensation and desiccation. Our quality control laboratory is well equipped with most advanced instruments,such as HPLC,UV,GC,AA etc. We can supply full series of black cohosh products,we also do OEM service,and we can produce according to the customs¡¯specific request: 1. Black cohosh Extract Powder with Triterpene Glycosides2.5% 5% 8% HPLC 2. Other products according to your request Action: 1)It was used to treat joint, muscle and nerve pain, rheumatism and menopause. 2)Black cohosh extract is approved for treatment of premenstrual syndrome and dysmenorrhea (painful menstruation) and for menopausal symptoms