The harm of children eating sugar is mainly reflected in the increase in the incidence of dental caries, leading to malnutrition or obesity, while increasing the risk of the onset of chronic diseases such as diabetes in adulthood. 1. Increase the incidence of dental caries: after eating sugar, if you do not maintain oral hygiene, sugar fermentation in the mouth, easy to produce acid, corrosion of tooth enamel, resulting in tooth decay. 2. Lead to malnutrition: after the child eats sugar, some children with poor digestive function have a strong sense of satiety, leading to other nutrient intake and absorption obstacles, resulting in nutritional imbalance, and even triggering malnutrition. 3. Obesity: after sugar is absorbed into the body, excess sugar will be converted into fat and stored, leading to overweight or obesity in children. 4. Increase the risk of cardiovascular disease in the long term: excessive sugar intake can easily lead to weight gain, obesity, which can induce hypertension, high blood pressure, high blood fat, diabetes and other diseases, resulting in increased risk of cardiovascular disease. The World Health Organization recommends that children over one year of age consume no more than 25 grams of added sugar per day. Children under one year of age should not have added sugars in their food, so if possible, food should be kept light and original to keep them healthy.