| | Conditions & Treatments | Digestive Health Can you eat red salmon sushi two days before a colonoscopy? No. You must stop eating all uncooked fish at least five days before your colonoscopy to avoid altering test results. Digestive Health - Related Articles Foods That Prevent Bloating Digestive Fluid Paths About Stomach Gas How to Remove a Spleen in a Cat Pain Relief for Liver Can the gallbladder remove gallstones by itself? Cause of Malabsorption and Acid Reflux