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Canning -- Miscellaneous
If canned foods have been frozen during storage, are they safe to eat?
Freezing does not cause food spoilage unless the seal is damaged or the jar is broken. These often happen as the food expands during freezing. Frozen foods, however, may be less palatable than properly stored canned food. In an unheated storage place, protect canned foods by wrapping the jars in paper or covering them with a blanket. Source: Original FAQ posted at http://18.104.22.168/faq/FAQ_home.php