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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.
Health Advantages of Vinegar. Vinegar may help reduce unhealthy food cravings. Vinegar has been used as a food and medicinal tonic for centuries. Made by the fermentation of grains such as barley, rye, wheat and rice or juices such as grape and apple, vinegar is available in a variety of flavors and colors.