ginseng - Modern science and ginseng
As with herbalism in general, ginseng's medical efficacy remains controversial. It has been difficult to verify the medicinal benefits of ginseng using modern science, as there are contradictory results from different studies, possibly due to the wide variety and quality of ginseng used in studies. Another issue is the profit potential of corporate research since ginseng cannot be patented. As a result, high-quality studies of the effects of ginseng are rare. Incidentally, one of the better studies involving ginseng actually uses a proprietary ginseng extract. ^flu although animal experiments to determine whether longevity and health were increased in the presence of stress gave negative results. ^adapt2 .

Panax ginseng appear to inhibit some characteristics associated with cancer in animal models; nevertheless, this effect is unclear in humans. ^{cancer Stockley WHO (1999)}

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