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Vinegar is used to preserve a wide variety of vegetables and fruits, along with meats, fish and eggs. Preserving food with vinegar is called pickling. A short list of foods â¦ that are commonly pickled would include pigs' feet, herring, beets, cucumbers, onions, olives, peppers, peaches, pears, and watermelon rind.o preserve food the pioneers used salt, and vinegar and they could have sun dried the food and they might have had root cellars to keep the preserved food edible and cool.
Another popular use for apple cider, and other vinegars, is as a food wash to reduce bacteria or viruses on the surface of fruits and vegetables. Studies have had varying results, often depending on the type of fruit or vegetable and the amount of time spent in the vinegar solution.