1. Frozen dumplings may be contaminated or thawed and spoiled during cold chain processing, production and transportation. If they are sold in bulk, there may be intentional or unintentional direct contact with people, causing food contamination. Exposure of large quantities of bulk frozen dumplings to air may also cause evaporation of water from the dumplings, cracking, and spoilage. Therefore, frozen dumplings may not be fresh. Moreover, it is difficult to judge the freshness of frozen food when it is kept at low temperature for a long period of time. If you eat contaminated or spoiled dumplings, it is easy to cause gastrointestinal diseases.

2. It causes nutritional imbalance. There are vegetables and meat in the dumpling filling, but these dumpling fillings are single, small amount, unbalanced nutrition, and the dumpling filling will lose some nutritional value if it is frozen for a long time. Frozen food is not a harmful food, but eating it alone for a long period of time will lead to unbalanced nutrient intake, which will lead to a series of illnesses. In addition, frozen dumplings filling may have nitrite, and nitrite is easy to cause cancer, so it is recommended to have fresh food to the main, as little as possible to eat frozen dumplings.