Puffed foods may be harmful if eaten 2 months after the expiration date. Puffed food includes fried puffed, baked puffed, pressure puffed and so on. The shelf life of the product refers to the product under normal conditions quality assurance period, if it is past the shelf life of the food, no longer has the value of food. Therefore, puffed food expired 2 months can not be consumed. The puffed food itself is more sugar, more salt, more MSG, higher calories, normal consumption may trigger obesity, leading to physical sub-health. Therefore, puffed food itself is harmful, expired 2 months puffed food is also harmful, expired can not be eaten, not expired as little as possible to eat or not eat, to prevent the occurrence of disease.