Researchers have found a significant difference in the gut microbiota of men with prostate cancer, compared with those who have benign biopsies. Although the finding is an association, it could partly explain the relationship between lifestyle effects and geographical differences in prostate cancer. Gut microbiota are the collection of microbes in the gastrointestinal tract and they affect processes and mechanisms in the body. The state of gut microbiota has been linked to many conditions, even in organs that are far from the intestines, but their role in prostate cancer is not understood. Professor Peter Bostrom used samples collected from patients...