Dr Philip Smith, Digital and Education Editor of Gut and Honorary Consultant Gastroenterologist at the Royal Liverpool Hospital, Liverpool, UK interviews Dr Veronica Witte from the Department of Cognitive Neurology, University of Leipzig Medical Center, Leipzig, Germany, on the paper "Prebiotic diet changes neural correlates of food decision-making in overweight adults: a randomised controlled within-subject cross-over trial" published in paper copy in Gut in February 2024 and available online - https://gut.bmj.com/content/73/2/298