Researchers have discovered which gut bacteria help our immune system battle cancerous tumors and how they do it. Researchers have discovered which gut bacteria help our immune system battle cancerous tumors and how they do it.  The discovery may provide a new understanding of why immunotherapy, a treatment for cancer that helps amplify immune response, works in some cases, but not others.  The findings show combining immunotherapy with specific microbial therapy helps the immune system to recognize and attack cancer cells in three forms of cancer. Former Lead Dietitian at the Cleveland Clinic Wellness Institute Kristin Kirkpatrick, MS, RDN, discusses which gut bacteria were discovered to help our immune system battle cancerous tumors and how they do it. Want better health and nutrition? Now you can get personalized supplement recommendations and custom vitamin packs delivered to your door! Go to PersonaNutrition.com/Roizen and take your free assessment and get 50% off your order today. - sponsor   Bonus How Your Diet Affects Your Risk for Cancer