The "low FODMAP diet" is a well-established elimination diet that helps to control such symptoms and is a great diet for patients with irritable bowel disease and other digestive disorders. Most likely your physician suggested to go on a "low-FODMAP diet". This reintroduction phase can be planed based on individual FODMAP groups (lactose - fructose - fructans - polyols - galactooligosacharides) or based on individual high-FODMAP foodstuffs, whichever way you prefer. The diary will help you to record the foods and drinks you ingest, the quantity and the occurrence of symptoms. At the end of the book you will find lists where you can record the foodstuffs and the respective quantity that your body tolerates well (enjoy - list), that your body tolerates on some days but not on other days (be careful - list) and that your body does not tolerate (avoid - list).