Kehoe's sauerkraut's are dry salted and fully fermented before being jarred. The nutritional benefits are increased by our traditional fermentation process. A more mature kraut guarantees plentiful beneficial bacteria and a full bodied flavour. The kraut also becomes more acidic and acts as a digestive enzyme, allowing easier digestion and absorption of more nutrients. Do not heat above 40 deg C if wanting probiotic benefit. Preservative free, but naturally acidic so will keep well for months once opened if not contaminated after opening. It’s best to use a clean fork, close lid immediately and refrigerate.