The key to a clear liquid diet is to consume clear liquids that are easily digestible and do not leave any residue in your digestive system. Here is a Top Five list of red and purple foods and drinks to avoid before your colonoscopy: Jell-OAvoid strawberry, raspberry, cherry or black cherry and grape. To avoid such instance, the doctor prescribes a set of instructions related to your diet to ensure that the colon is clean and clear. It is important to stick to clear liquids the day before your colonoscopy so that your doctor can get a clear view of your colon during the procedure. Connect with a U.S. board-certified doctor by text or video anytime, anywhere. The day of the colonoscopy procedure As on the previous day, clear liquid foods only. Avoid colors that are either red or purple. Apart from avoiding gelatins that contain red food dye, you also have to look for other products that utilize the color. While a clear liquid diet limits what you can eat before a colonoscopy, you don't just have to stick to water and clear broth. Just make sure to avoid red, blue and purple fluids (more on that later). Sign In Our articles are resourced from reputable online pages. Tea and black coffee without any milk, cream, or lightener, Clear, light colored juices such as apple, white grape, lemonade without pulp, and white cranberry, Clear broth including chicken, beef, or vegetable, Sports drinks such as Gatorade and Propel (light colors only), Popsicles without fruit or cream; no red or purple dye, Jello-O or other gelatin without fruit; no red or purple dye, Juice, Popsicles, or gelatins with red or purple dye, Kaiser Permanente health plans around the country: Kaiser Foundation Health Plan, Inc., in Northern and Southern California and Hawaii Kaiser Foundation Health Plan of Colorado Kaiser Foundation Health Plan of Georgia, Inc., Nine Piedmont Center, 3495 Piedmont Road NE, Atlanta, GA 30305, 404-364-7000 Kaiser Foundation Health Plan of the Mid-Atlantic States, Inc., in Maryland, Virginia, and Washington, D.C., 2101 E. Jefferson St., Rockville, MD 20852 Kaiser Foundation Health Plan of the Northwest, 500 NE Multnomah St., Suite 100, Portland, OR 97232 Kaiser Foundation Health Plan of Washington or Kaiser Foundation Health Plan of Washington Options, Inc.,1300 SW 27thSt., Renton, WA 98057. Thanks for visiting. Created for people with ongoing healthcare needs but benefits everyone.