Yes, but the main component of harmful cold drinks is water. In addition, ice cream and ice cream contain some sugar and milk. These nutrients are low and cannot be used as staple food to provide nutrition. If a large number of cold drinks enter the digestive tract, supercooling can seriously affect the secretion of digestive juice and gastrointestinal function. Normal digestive juice contains gastric acid and digestive enzymes, which helps to kill bacteria entering the digestive tract and promote food digestion and absorption. If the digestive juice is reduced, the digestion and absorption of food will be affected, and it is easy to cause intestinal infection, loss of appetite, abdominal pain, diarrhea and fever. It is not appropriate to eat cold drinks before or after meals. Eating cold drinks before meals will affect appetite and lead to nutritional deficiency. Cold drinks contain nutrients such as milk, but their content is far less than that of normal diet. Eating cold drinks immediately after meals can reduce gastric acid secretion, reduce immune function of digestive system, lead to bacterial reproduction and cause intestinal diseases such as enteritis. A moderate amount of cold drinks can cause gastric mucosal vasoconstriction, reduce gastric juice secretion, lead to decreased appetite and affect human digestion of food. The intake of cold drinks should be about 150ml at a time. It's hot in summer, so it's a good enjoyment to drink a can of frozen coke in one breath and bite off a few popsicles. However, the harm to the body can't be made up by this refreshing. Drinking cold drinks should be the same as drinking hot soup, savoring it carefully and drinking it slowly. It is advisable to avoid different people and have different requirements for cold drinks, especially those with diseases, and should eat less or even avoid cold drinks. Babies avoid cold drinks, and children eat less cold drinks; People who are old and weak and suffer from cardiovascular diseases should not eat more cold drinks. Eat cold drinks from roadside stalls carefully. Carefully check the production date and shelf life when purchasing, and try to choose products with close factory date. Carbonated drinks are rich in taste. According to the classification standard of soft drinks in China, there are quite a few flavors of carbonated drinks: fruit juice, cola, low-calorie and other types of carbonated drinks. Professor Zhang Jiazhi said that the original fruit juice, such as orange juice soda and orange juice soda, was added to the fruit juice carbonated drink, which added a lot of vitamins and other nutrients. However, compared with it, fruit-flavored carbonated drinks are made with essence, such as orange soda and lemonade. Although they are bright in color, they only imitate the taste of fruits, not fresh fruits, so their nutritional value is much inferior.