 [ Symptoms ] will have a colonoscopy next week what do you suggest i eat this week before the test in the past i have fasted 2 days and still failed to get good clean out is there a suggested diet i should follow this week before i go to clear liquids only for the 2 days before the test [ Disease ] well i would suggest you simply eat a normal diet and follow the prep instructions to the letter fasting before a colonoscopy may sound like a good idea but could actually backfire abstaining from food or drink for 48 hours can have a profound effect on the digestive system and cause the prep solutions not to work correctly so again my advice is to follow the written instructions you received these instructions have helped thousands of patients achieve a good clean out prior to colonoscopy and with luck they will work for you too here is hoping things go better this time around