Snacks, under normal circumstances, in people's life, except for the food called dinner in three meals a day, the rest are all called snacks. Children generally prefer to eat snacks, but it is easy to cause partial eclipse. Most parents will control their children to eat snacks, but do they all know the harm of various snacks to their children? Harm of eating snacks Preservatives exceed the standard Food preservatives are natural or chemical synthetic substances added to food to ensure the preservation needs of food during transportation and storage. Such as benzoic acid, potassium sorbate and nitrite, too much intake will inhibit bone growth to a certain extent and endanger the health of kidneys and livers. Excessive saccharin In order to improve the sweetness, excessive saccharin may be added to foods such as candied fruit, ice cream, cakes and biscuits, which will cause gastrointestinal discomfort and liver metabolism problems. After hydrolysis, saccharin sodium will also form cyclic ethylamine, which poses a cancer threat. Snacks with high salt and sugar, such as preserved plum and dried bean curd, contain a lot of salt or sugar, which will increase the burden on the kidneys and pose a threat to the cardiovascular system. In the European and American markets, foods marked "sugar-free" and "salt-free" will be more popular. A large number of trans fatty acids in the market, most cakes, ice cream and biscuits contain "vegetable butter" and "vegetable butter", which contains a large number of trans fatty acids. Excessive intake will damage children's intelligence, harm their hearts and lead to infertility. Excessive pigment Some food production units often overuse synthetic pigments, such as puffed food and candy, in order to pursue the "good looks" of small foods. However, the risk of synthetic pigment to human body is higher than that of natural pigment. If consumers eat a lot of food with excessive pigment content for a long time or at one time, it may cause symptoms such as diarrhea, especially for the healthy development of children. Natural pigments are safe but costly, and many enterprises are reluctant to use them. Bubble gum: Bubble gum contains a variety of additives such as plasticizers. If it is kept in the mouth for a long time, it is easy to swallow the gum base, which has adverse effects on children's health. Jelly: The main ingredient is sodium alginate. Eating too much will affect the digestion and absorption of protein and fat, and will also reduce the absorption of iron and zinc, which is not good for children's growth and development. Popcorn: Popcorn has a high lead content, which is easy to cause children's growth retardation and disease resistance decline. Fat: Children often eat more fat, which will not only cause obesity, but also affect the absorption of calcium ions, and over time will also cause calcium deficiency in the body. Canned food: In the process of making canned food, additives such as pigments, flavors, sweeteners and preservatives should be added. Because children's development is not yet mature, and the liver detoxification function is not perfect, these additives have great influence on children's health. Coke beverage: Coke contains a certain amount of caffeine, which has a strong exciting effect on the central nervous system and is potentially harmful to the human body. Milk candy: Milk candy remains between children's teeth, which is quickly transformed into acidic substances by oral bacteria, and a small amount of organic acids are generally added to milk candy, which will loosen tooth tissue, decalcify and dissolve, and even cause dental caries in severe cases. Colored food: Some food pigments are artificially synthesized by chemical methods, which will interfere with the normal metabolism and the normal functions of various active enzymes in the human body, and accumulate in the body will also lead to chronic poisoning. Eating too much colored food may affect the nervous system and lead to ADHD in children.