keywords: antioxidants antioxidant vitamins cancers supplements
text: Study Shows Antioxidants Not Useful Vs. Cancer By EMMA ROSS    LONDON (AP) -- In another blow to the belief that antioxidant supplements improve health, an authoritative analysis has concluded there is no evidence the vitamins ward off common digestive cancers.    Some experts say, however, that the findings do not mean the cancer-fighting potential of antioxidant pills should be written off just yet...