Professor Aedin Cassidy, from the Department of Nutrition at UEA's Norwich Medical School, led the study. "This is the first large-scale study looking into whether habitual intake of different flavonoids can reduce the risk of epithelial ovarian cancer,' she said. "We found that women who consume foods high in two sub-groups of powerful substances called flavonoids flavonols and flavonones had a significantly lower risk of developing epithelial ovarian cancer.