IBS and IBD sufferers the one fruit you should add to your diet that may drastically reduce your symptoms is Pomegranate. The University of Louisville in Kentucky said their discovery highlights the importance of gut health to protect from IBD, the umbrella term for Crohn's and ulcerative colitis. The fruit contains polyphenols that interact with gut bacteria. They are also found to some extent in other berries such as strawberries, blackberries and raspberries. It results in anti-inflammatory effects by 'tightening' the gut wall.