In work that emphasizes the need for stronger regulations of herbal drugs, an international team of MIT scientists and colleagues has unraveled the yin and the yang of ginseng, or why the popular alternative medicine can have two entirely different, opposing effects on the body. Conflicting scientific articles report that ginseng can both promote the growth of blood vessels (key to wound healing) and stymie that process. The latter is important because preventing the formation of blood vessels can be enlisted against cancer. Tumors are fed by blood vessels; cutting off their supply can kill them. In the Sept. 7, 2004 issue of Circulation: the Journal of the American Heart Association, the researchers from the United States, England, the Netherlands and Hong Kong explain these dual effects for the first time.
