posted 7 years ago
Old dehydrated food doesn't get dangerous, as far as I know. It just loses flavor and nutrition. I bought dehydrated veggies and they were still good after 3 years. When they were closer to 10 years old I fed them to the chickens.
So, if they taste OK, they are OK. The big risk in preserved food is botulism, it can kill you and it doesn't change the taste obviously. This pathogen can't grow in acidic environments, which is why you can water bath can fruits and tomatoes. It also doesn't do well in dry environments, or oxygenated environments. Thus, dried fruit should be fine. Maybe be sure to cook the corn.