Dietary polyphenols are widely present in fruits,vegetables and many kinds of processed plant originated food.Accumulated data revealed that dietary polyphenols play important roles on prevention of many diseases and health maintenance of human although the exact mechanism remained unclear completely.This review summarized the research status on functionality of dietary polyphenols including molecular mechanisms of antioxidation,and antiinflammation and apoptosis induction of cancer cells,and further influence on bacterial flora in the intestine.These informations provide the basis for further...