Once a can of tuna has been opened, any unused portion will need to be refrigerated. Can food be re-canned if the lid does not seal? Canned tuna may not be the healthiest way to eat tuna, but it does retain most of its original nutritional value after being canned. The best temperature for storage is room temperature. To re-can, remove the lid and check the jar sealing surface for tiny nicks. Since tuna doesn’t stay fresh for a very long time, you will need to keep it in a sealed container in the refrigerator until you are ready to eat it. Use high-acid foods like fruit, pickles and tomatoes within 2 years of the date on the package. With two-piece metal lids, use a new prepared flat lid. They can be readily warmed with running water in the sink for a few minutes. Use canned meats and seafood within 3 years of the date on the package. Canned tuna can be refrigerated in the home kitchen. How To Store Tuna? You can use zippered disposable bags for storing uneaten food. How long does opened canned tuna last in the refrigerator? The reason has nothing to do with food safety, or metal or chemicals from the can corroding and leaching into the food. In case, you want to store the leftovers after opening a can. Jars of of home canned products should be safe for an unlimited period of time IF they were canned following safe procedures and were stored at moderate temperatures (above freezing, below 90'F). Safely processed home canned food can be re-canned if the unsealed jar is discovered within 24 hours. This is because when a can has been opened and the food is open to the air, the tin from the can might transfer more quickly to the can's contents. Tuna that has been continuously refrigerated will keep for about 3 to 4 days. – Additional Information. How long does opened canned tuna last in the refrigerator? You should most definitely make sure to refrigerate the tuna that you get home from the supermarket, whether it is canned or fresh, in order to avoid it going bad. Canned fruit juices can be stored up to 1 year. This advice doesn't apply to foods sold in cans that have resealable lids, such as golden syrup and cocoa, because these types of food don***8217;t react with the can. To maximize the shelf life of canned tuna (or tuna sold in a vacuum-sealed pouch) after opening, refrigerate in a covered glass or plastic container. Concerns about one chemical in particular, Bisphenol-A … Tuna that has been continuously refrigerated will keep for about 3 to 4 days. If the jar contents are years old, the quality be very poor and nutrition may be limited. If it remains unopened, you can make its best use up to 1 year. Change the jar, if necessary. The good news is that not all tinned foods need to be decanted. To maximize the shelf life of canned tuna (or tuna sold in a vacuum-sealed pouch) after opening, refrigerate in a covered glass or plastic container. on http://healthytuna.com it says: Prior to Opening: * Place cans and pouches of tuna in a cool place. Canned tuna has decent amounts of omega-3 fatty acids, protein, the antioxidant selenium, and vitamin D.   The next serving can be warmed, as most cats don't like cold food. Canned food remaining in the can should be covered and refrigerated immediately after opening. To avoid a "tinny" taste, Eat Right advises transferring the remaining tuna to a separate (air tight) container before popping it in the fridge and to use it up in the next day or two. Use low-acid canned foods like vegetables and soup within 3 years of the date on the package. If it is frozen, you can extend its lifespan to a great extent.