Some of the non-scummy foods you can eat the day before your colonoscopy are: egg custard, thin rice porridge, soymilk, rice soup, etc., but you need to pay attention to your intake when you eat them. Dregs-free diet refers to food that contains very little or no fiber, such as: egg custard, thin rice porridge, soybean milk, rice soup, etc. This kind of food is easier to digest and contains less dregs, which is not easy to accumulate in the intestinal tract, so as not to affect the intestinal preparation before the colonoscopy. And it can also replenish the nutrients needed in the body in time. In order not to affect the results of the colonoscopy examination, before the colonoscopy requires a non-slag diet, in addition to a non-slag diet, you also need to use some drugs to clean the intestinal tract, such as magnesium sulfate, etc., the specific precautions recommended to follow the doctor’s instructions.