Dr Philip Smith, Digital and Education Editor of Gut and Honorary Consultant Gastroenterologist at the Royal Liverpool Hospital, Liverpool, UK interviews Professor Fredrik Bäckhed, The Wallenberg Laboratory, Department of Molecular and Clinical Medicine, University of Gothenburg, Gothenburg, Sweden on the paper '6α-hydroxylated bile acids mediate TGR5 signalling to improve glucose metabolism upon dietary fiber supplementation in mice' published in paper copy in Gut in February 2023, and available online: https://gut.bmj.com/content/72/2/314 Please subscribe to the Gut Podcast via all podcast platforms, including Apple Podcasts, Google Podcasts, Stitcher and Spotify, to get the latest podcast every month. If you enjoy our podcast, please consider leaving us a review or a comment on the Gut Podcast iTunes page (https://podcasts.apple.com/gb/podcast/gut-podcast/id330976727).