The dangers of consuming expired food include the following. First of all, it is easy to cause digestive system diseases. Some expired foods will breed a large number of bacteria due to deterioration, and human consumption will lead to bacterial infection of the digestive system and cause the occurrence of diseases, common diseases include acute gastroenteritis, bacterial dysentery, Helicobacter pylori infection, etc. Secondly, the risk of cancer can be increased for peanuts, cakes, rice and other expired food after a series of chemical reactions, easy to produce aflatoxin, nitrite compounds and other carcinogenic substances, these harmful substances into the human body, not only will cause varying degrees of damage to the liver system, and even lead to malignant tumor disease in the human local tissues. So in the daily diet, pay more attention to the specific shelf life date of the food to avoid eating expired food.