You will be given a short list of foods that should be avoided starting about one week before the colonoscopy. In general, a low-fiber diet is recommended in the days leading up to the test.

To prepare for a colonoscopy, you may need to avoid fiber in the days leading up to your appointment and follow a clear liquid diet beginning the day before. Preparation also involves taking ...

They may need to adjust to these medications before the procedure. To have a successful colonoscopy, you must have a clean colon. That means you need to restrict your diet at least 24 hours ...

That said, if you have an underlying digestive condition or experienced complications during the colonoscopy, you may need a longer period of recovery before returning to a normal diet.