For diabetic patients, the bowel preparation period before a colonoscopy is of great importance for maintaining blood sugar balance. Strict adherence to the special diet program implemented during this process is required. While solid foods are completely forbidden one day before the colonoscopy, the consumption of clear liquids is permitted. To help stabilize blood sugar levels, beverages such as pulp-free apple juice or orange juice can be chosen. It is recommended to seek personalized advice from your doctor or dietitian on this matter.