AUTHOR=Wang Kai , Sun Guiju , Conlon Michael A. , Ren Wenkai , Yang Guan TITLE=Editorial: Dietary Polyphenols for Improving Gut Health: Volume 1 JOURNAL=Frontiers in Nutrition VOLUME=8 YEAR=2021 URL=https://www.frontiersin.org/journals/nutrition/articles/10.3389/fnut.2021.760917 DOI=10.3389/fnut.2021.760917 ISSN=2296-861X