" Writing in the Journal of the National Cancer Institute, the researchers said broccoli and cauliflower were known to contain anti-cancer compounds. "

" Experts advised the best way to reduce cancer risk was to eat a balanced diet, including lots of fruit and vegetables. "

" Several studies have shown a link between eating vegetables and a reduced risk of prostate cancer, but results have not been consistent and many have not specifically looked at deadly forms of the disease. "

"Experts have proven that the best way to reduce your risk of many cancers is to eat a healthy balanced diet"

" A team from the US National Cancer Institute and Cancer Care Ontario in Toronto carried out food questionnaires in a group of patients diagnosed with prostate cancer in a large screening trial. "

" Overall, they found that eating fruits and vegetables was not associated with decreased prostate cancer risk. "

" But greater consumption of dark green and cruciferous vegetables, especially broccoli and cauliflower, was associated with a decreased risk of aggressive prostate cancer. "

" A weekly serving of cauliflower was associated with 52% decreased risk of aggressive disease and similar amounts of broccoli cut the risk by 45%. "

" Spinach consumption also seemed to be associated with a reduced risk but the findings were not significant when the researchers looked at cancer which had spread beyond the prostate. "

" Study leader Dr Victoria Kirsch, Cancer Care Ontario, said: "Aggressive prostate cancer is biologically virulent and associated with poor prognosis. "

" "If the association that we observed is ultimately found to be
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