According to your description, I personally suggest that if there are problems such as air leakage and flatulence before buying, please don't eat it. Of course, if you eat it by mistake, it may cause diarrhea and other problems. If it is air leakage or flatulence caused by careless damage or other problems after purchase, you can eat it before ensuring that the food has not gone bad, because when air enters, microorganisms and moisture in the air will come in, which will cause food to go bad. This has nothing to do with the production date and shelf life, that is to say, the shelf life and production date can only be done when the food is in a vacuum state. I hope the above suggestions can help you, thank you.