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How To Tell If Canned Tuna is Bad? And Is It Safe To Consume After It Has Expired?

Eating fish can be one of the good sources of protein for the body. And know how to tell if canned tuna is bad? and is it safe to consume after it has expired? Because fish has the completeness of amino acids, fats, vitamins, minerals, omega 3 which is very good and easy to digest and absorbed by the body.

The choice of fish available is also very diverse both in type and price. Some of the fish that we often consume are tuna, cob, skipjack. The three fish come from the same family of Scombridae including tuna. Have you eaten the fish so often? Let’s take a look at the specialty of tuna for health.

Are canned tuna fish safe to consume?

Sea fish is often considered an excellent food to consume because it has a variety of nutrients needed by the body. However, lately, we have not only found sea fish in fresh conditions where many canned marine fish products are also easy to find in markets or even supermarkets.

Many people consider that canned tuna fish is very practical to consume because it can be cooked at any time and can be a delicious side dish. However, health experts say that daily consumption of canned tuna is quite safe, however, there is a risk of mercury poisoning derived from the meat of this fish.

For information, if we are poisoned by mercury, we will easily experience tingling until the loss of balance of the body. Mercury poisoning itself often occurs in those who consume tuna too often.

Uniquely, if the mercury content of canned tuna is much lower when compared to fresh tuna fish. This means we will get a lot of good nutrients from tuna fish such as vitamin A, vitamin B6, folic acid, to omega 3 fatty acids that will be very good for the health and development of children.

It’s just that, also consider whether this canned tuna product uses preservatives or not. Although it is quite safe, the consumption of canned tuna should not be too frequent.

And experts recommend the consumption of tuna fish as much as 150 grams two to three times a week alone so that we will absorb a lot of good nutrients from tuna fish without the risk of experiencing side effects from its mercury content.

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Nutritional facts of tuna in cans

In a 1-ounce package, canned tuna in oil contains:

Calories: 56

Fat: 2.3 grams

Protein: 8.3 grams

Carbohydrate: 0 grams

Fiber: 0 grams

Sodium: 416 milligrams

In a 1 ons package, canned tuna in water contains:

Calories: 24

Fat: 0.3 grams

Protein: 5.5 grams

Carbohydrate: 0 grams

Fiber: 0 grams

Sodium: 247 milligrams

Benefits of tuna in cans:

  • In addition to being a good source of protein, canned tuna can also be a source of vitamin D and omega 3 fatty acids.
  • Vitamin D and omega 3 are essential nutrients for brain development and cognitive function in addition to being inflammatory reliever substances.
  • Vitamin D also plays an important role in bone health, immune function, cell growth, while omega 3 functions to support cell structure.

If you are worried about mercury content, choose tuna whose meat is white only. The reason is that canned tuna with white meat is usually made from younger fish that are smaller in body weight so they have not long absorbed heavy metals in the sea.

For white tuna, it is recommended to consume at most up to 5 ounces a week. Also, choose canned tuna that is minimally mixed, just choose the least seasoning such as water or oil only, without seasoning.

Mercury is a dangerous type because it is a chemical element on the periodic table with the symbol Hg and atomic number 80.

Also, I often make fish as a very delicious dish that Ahi Tuna Recipes Pan-Seared Without Soy Sauce is a recipe for tuna ahi grilled without soy sauce, fresh tuna cooked with a sprinkling of sesame will give off a distinctive aroma served with a healthy seaweed salad and very delicious.

Is Canned Tuna Good For Our Digestion?

Recently the health world was surprised by the presence of worms in canned mackerel. In addition to mackerel and sardines, there are other types of canned fish that are often consumed by the public, namely tuna.

Although it tastes good for health and is claimed to have a high nutritional value, health experts advise us not to consume it often because it is considered less good for the digestion of the body.

Canned tuna fish turns out to have a very high zinc content that can have a bad impact on our health, especially for the gastrointestinal tract. The existence of salt is intended to coat the inside of the can to maintain the quality of tuna fish so that it is not easily stale.

Unfortunately, this content turns out to be absorbed in tuna meat that we end up eating. If we often consume it for a long time, then the presence of this zinc mineral will affect the body’s ability to absorb food and eventually trigger the arrival of health problems.

A study conducted in the United States stated that canned foods such as tuna, sweet corn, asparagus, and the chicken turned out to have 100 times more zinc content than the safe limit suggested by health experts.

Zinc content in canned tuna fish can settle in the digestive tract of our body and eventually change its function significantly. Not only that, the zinc content is feared to trigger inflammation of the gastrointestinal tract and this can be very dangerous if consumed in the long term.

How do I know if your canned tuna is bad?

When we buy a can of tuna, most of us think it can last almost forever. Most people just throw it in the kitchen, others prefer to let it cool down.

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However, in both cases, the main and essential aspects are lost and this aspect is called the expiry date of canned tuna.

How To Tell If Canned Tuna is Bad And Is It Safe To Consume After It Has Expired

How long canned tuna last?

Cans that are initially sealed properly and then filled as required can easily remain edible for up to 3 years if stored in the kitchen without opening. In certain situations, for example, if the storage space is dry enough, the storage duration may increase by several more years!

Of course, the long shelf life of canned tuna is supported by the right conditions that must be provided to keep foodstuffs consumed and the highest quality to the longest.

How to store the correct canned tuna:

Store unopened foodstuffs in a cool, dry place

Double-check that the tank contains fish away from refrigerators, stoves, and other equipment that is a source of heat that damages these foodstuffs

Always keep the can with the fish dry and off the floor to avoid the possibility of rusting

Once the tank with tuna is opened, its contents should be transferred to an airtight container and cooled but not more than 4 days. The same goes for leftover fish

Salads with canned tuna will still be able to be consumed for up to three days if cooled at once.

Surely we can not always consume all the tuna that we have at home, especially if we tend to buy a lot, for large families for example, or if we need it to make food for parties, etc.

How long can tuna last after the expiry date?

Well, if the tank is still tightly closed and not damaged such as without rust, leakage, etc., its content can be safely consumed far beyond the best date. Nevertheless, that doesn’t mean that it will last forever: the more time it spends, the higher the risk of content getting worse in terms of quality.

Things to keep in mind!

No food can last forever! Therefore, it is recommended to consume canned tuna within 2 or a maximum of 3 years after purchase.

How long does canned tuna last after it’s opened?

As you’ve guessed, once we unseal the tank, the durability of its contents disappears. Unsealed canned fish will not be dangerous to eat for only 3 days if we store them in the refrigerator and sealed properly in an airtight tank.

How long does canned tuna last in the fridge if it hasn’t been opened?

Storing canned tuna has not been opened like this to prevent possible decay. Storing them in a cold state is unnecessary because canned groceries can be very good in your kitchen. When we put it in the fridge, we put it under the risk of excessive cooling at some point which may not be so good for the product.

Is Canned Tuna Getting Worse?

Perhaps people still believe that food packaged in this way can last forever because it is indeed rotting canned tuna. Among the most common external factors that cause the expiry of canned tuna to get closer, we can make the list as follows:

  • Hot
  • Moisture
  • Direct light

Can you eat expired canned tuna?

Of course not! Like other foods, canned fish including tuna can be harmful to our health if consumed. And this fish after the expiry date of tuna is thought to have some unpleasant effects such as

  • Nausea
  • Vomiting
  • Abdominal pain
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So, if you don’t want to end up with severe food poisoning, we would advise everyone to avoid fish and groceries in general

Defying rotten foodstuffs can save lives or will at least protect you from stomach pain and food poisoning.

How do I know canned tuna is bad?

We have prepared a complete list of the most and least obvious symptoms of the decay of these foodstuffs so that everyone can determine exactly which tanks are bad and which are not

Expired tuna can be seen from the date on the tin

If you notice that the expiration date of canned tuna is long gone, throw it in the trash.

To determine the rotten tuna, look for leaks

Leaking cans are not a good sign, it means that the pickling is wrong and the contents are no longer protected by the can itself. So even though the expiry date is okay but the can leaks, just throw it away.

Sniffing well

If you do not see a clear sign of external decay but for some reason, you are still worried about the quality of the product, unseal it, and smell its contents.

Doesn’t smell fishy? Not good? Smells rotten, or even sour? Don’t hesitate, throw it away immediately, and remember to wash your hands so that no rotten fish juice hits you.

Brown, green, or black tuna

This indicates that the fish is already rotten or already very rotten. Such a fish will have a visible brown, black, or green stripe spread through the meat.

Pink is your guide light!

Tuna fish is one type of fish whose meat is bright pink to bright red. Yes, sometimes the fresh red meat may have a very light brownish color, but the meat should be pinker, redder, not brown.

Can blast

This is yet another clear and hard-to-miss sign that tells us that things have gone bad and the groceries will never be revived. So, if you notice that the tuna properly explodes right after the seal is opened, throw it away immediately!

Bulging cans

If the seal can inflate, then something is wrong with its contents and we won’t even try to open it or see, what doesn’t work. Take the can, throw it in the trash, and buy another new one.

Rust is another bad sign to be found in cans with tuna

Just like corrosion, rust tends to make small holes in the surface of objects that appear guesswork? causes the decay of tuna because air and moisture can now easily get into the can.

Dents or broken cans

It shows us that its contents are no longer safe. Kalo, the lid is dented? In this situation, the pressure of the can is released. This allows harmful bacteria to appear and spread throughout the foodstuffs in them.


Indeed it is a risky method, but it can work if there are no obvious symptoms of decay. Just open the can and bite the fish a little bit. Although the smell you feel is okay, but the groceries taste bad or strange, just throw them away.

Tips for storing canned tuna properly:

  • Choose a canned tuna packaging that is still intact
  • Immediately move the rest of the tuna to another place
  • Close the storage area tightly
  • Store in the refrigerator
  • Do not repeatedly cook canned tuna
  • Do not consume foamy canned tuna

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