I'm pretty sure that ginseng contains an oestrogen and is taken by ladies after the menopause as a natural form of HRT. This should be done under the guidance of a physician, as HRT can have several nasty side effects and recent research has cast doubts on it use to prevent cardiovascular disease in this group of people.
It is said to have many healing and beneficial properties but two that spring to mind are to promote longevity and sexual appetite - see the Chinese population for evidence. (personally i don't bother cos it's like drinking balsa wood-flavoured hot water yeuk!)