Well, if you open the package containing the food, you might get a nice hiss.
More seriously, if the vacuum holds, and the food is stored in good condition, it could very well be perfectly fine. Steve has eaten vacuum-sealed food well over ten years old and been fine. He’s also eaten not vacuum-sealed food well over ten years old and also been fine.
You couldn’t keep food in a true vacuum in a finite space, because all the water and anything else volatile would evaporate. That said you could keep food a near vacuum, and without oxygen or exposure to bacteria or other microorganisms, the food would keep pretty well other than getting dried out.
I’m not sure if there are bacteria that can eat and multiply in a vacuum, but it’s possible that there are anaerobic (non-oxygen-breathing) ones that have weird biologies that don’t require anything that’s in the air.
I think we have to assume you mean it’s been dried out completely too, because otherwise moisture will evaporate out over time and now you don’t have a vacuum, you have water vapor. This also makes it much harder for bacteria do live and multiply
Beyond that, the molecules in food can break down into potentially nasty stuff without life breaking them down. Sunlight, especially UV exposure, can break down complex molecules. But I don’t know if anything in like a mcdonalds hamburger is going to break down into anything toxic or not.
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Well, if you open the package containing the food, you might get a nice hiss.
More seriously, if the vacuum holds, and the food is stored in good condition, it could very well be perfectly fine. Steve has eaten vacuum-sealed food well over ten years old and been fine. He’s also eaten not vacuum-sealed food well over ten years old and also been fine.
Depends on the food. Some bacteria can survive in a vacuum and if the right conditions are met mold can also grow.
Keep in mind that food can still go bad in a vacuum sealed bag.
You couldn’t keep food in a true vacuum in a finite space, because all the water and anything else volatile would evaporate. That said you could keep food a near vacuum, and without oxygen or exposure to bacteria or other microorganisms, the food would keep pretty well other than getting dried out.
I’m not sure if there are bacteria that can eat and multiply in a vacuum, but it’s possible that there are anaerobic (non-oxygen-breathing) ones that have weird biologies that don’t require anything that’s in the air.
I think we have to assume you mean it’s been dried out completely too, because otherwise moisture will evaporate out over time and now you don’t have a vacuum, you have water vapor. This also makes it much harder for bacteria do live and multiply
Beyond that, the molecules in food can break down into potentially nasty stuff without life breaking them down. Sunlight, especially UV exposure, can break down complex molecules. But I don’t know if anything in like a mcdonalds hamburger is going to break down into anything toxic or not.