Generally, you can eat egg custard the day before a colonoscopy. The day before the colonoscopy should try to eat non-dregs food, and egg custard is relatively easy to digest and absorb and non-dregs food compared to other practices of eggs. Eggs are a high-protein food, containing lecithin, vitamins, trace elements and other nutrients needed by the human body, and egg custard retains the nutrients of the egg itself to a greater extent. Overall, the day before the colonoscopy can eat egg soup is a good choice, not only to supplement the body’s nutrition, but also conducive to the body’s digestion and absorption. The day before the colonoscopy diet should pay attention to less residue easy to digest, appropriate more water, in order to make the process of intestinal preparation has a better bowel cleansing effect, in order to help the colonoscopy examination is carried out smoothly.