You can eat sauerkraut dumplings the day before the colonoscopy, but it is recommended to try to eat foods with less fiber and low residue, such as egg soup and rice porridge, and avoid root vegetables. And you should eat appropriately early, especially for people who usually have slow gastrointestinal motility and constipation.
For the colonoscopy effect it is best to focus on low-fat, low-fiber semi-fluid food, such as cucumber, egg, spinach, etc., three days before the colonoscopy is performed. The day before the colonoscopy is recommended to perform a liquid diet such as soups, soybean milk and so on. Try not to eat fruits with a lot of crude fiber and hard-to-digest foods, such as dragon fruit, fungus, purple cabbage, sweet potatoes and so on.
Bowel preparation will begin after dinner the day before the colonoscopy with a large amount of laxatives such as lactulose, compound polyethylene glycol electrolyte dispersions, etc., along with plenty of water. You usually cannot eat after 8:00 p.m. the night before the exam.