Erythritol is a kind of sugar extracted from starch in wheat and corn through a series of processes, containing very low calories, only 1/10 of sucrose, so it can be applied in small amounts to patients with diabetes. It is widely used in the food industry. Because of its small molecular weight, erythritol is not metabolized by the enzymes in the body, and all of it is excreted through the kidneys. Its molecular weight is 122 daltons, can all be smoothly discharged from the kidneys, so the original kidney is not a problem of patients, eat erythritol on the kidneys no harm. But any food on the kidneys may cause more or less impact, because erythritol used in food additives, if the intake of other foods containing erythritol, although erythritol is not harmful to the kidneys, can be discharged from the kidneys smoothly, but the processing of the other components of the food, it is possible to the kidneys caused by the unforeseen consequences.