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Is Tuna Acidic? (Good for Acid Reflux?)

When following a low-acid diet, it’s important to know the pH levels of the foods you consume the most. That way, you’re able to control what you consume and how much of your diet is filled with acidic foods.

Doing so will help you limit the frequency and severity of your acid reflux or GERD symptoms, which can be very unpleasant and painful. So, for example, is tuna acidic?

Tuna is a very healthy fish considered mildly acidic, thus safe to consume on a low-acid diet. Furthermore, it’s loaded with nutrients that can help you stay healthy while fighting the symptoms of acid reflux and GERD. Both fresh and canned tuna are mildly acidic, so it’s OK to consume both as part of your diet regardless of what dietary plan you follow.

On top of that, tuna is also a great alternative to meat if you’re a pescatarian or choose not to eat meat.

Don’t know what to drink? We made a list of more than 20 most and least acidic juices and 20+ alcoholic drinks ranked by acidity levels.

What is the pH level of tuna?

Fresh tuna — both broiled and oven-baked — has a pH level of around 5.2-61. On the other hand, canned tuna has a pH level of 5.9-6.2. 

This means that both versions are safe to eat on a low-acid, stomach-friendly diet. This fish is also loaded with nutrients, minerals, and vitamins, making it a wonderful addition to any diet.

Furthermore, tuna is widely available in almost any supermarket, both fresh and canned. It’s also worth noting that both versions are very healthy, and canned tuna is only mildly acidic.

Is tuna bad for acid reflux?

Is Tuna Acidic? (Good for Acid Reflux?)
Is Tuna Acidic? (Good for Acid Reflux?)

Tuna is a relatively low-acid fish, so it’s safe to consume on a diet that’s aimed at easing the symptoms of acid reflux and GERD. It’s also packed with nutrients, which makes it perfect for staying healthy and in shape.

Furthermore, the healthy fats and fatty acids in tuna help protect your stomach, so consuming it might help control your acid reflux and GERD in the long run.

Nevertheless, tuna is still mildly acidic, so some people might not tolerate it as well as others. Hence, make sure to listen to your body and adjust your diet accordingly.

Is tuna healthy?

Tuna is a fatty fish rich in omega-3 fatty acids. This nutrient is vital for the health of your heart, lungs, blood vessels, and immune system. Omega-3 acids are the building blocks of each of your cells, and they help control the energy levels.

Tuna and other fatty fish are wonderful sources of this nutrient, especially since many people need to take supplements to get enough of this nutrient. However, consuming fish once or twice a week can help you get all the omega-3 fatty acids you need.

Moreover, tuna isn’t too high in calories (both fresh and canned) while still providing you with a lot of protein. Protein is an essential macronutrient that contributes to muscle health and recovery after a workout. In addition, this nutrient helps build cells and keep your energy levels up throughout the day.

Canned tuna

Sometimes, it might be hard to eat a healthy diet, and canned tuna provides a cheap yet healthy source of vitamins and protein, so it’s good to keep a can or two at home.

Canned and fresh tuna is also a good source of healthy fats. Those fats, along with protein, have been proven to help with weight loss and overall health, especially the heart and blood vessels.

What’s important here, though, is to check the label when buying canned tuna since some are packed with oil and others with water.

Both are healthy options, but the one packed with oil packs significantly more calories, so it’s important not to overeat it.

On the other hand, canned tuna is higher in sodium than fresh tuna. Sodium is responsible for high blood pressure and an increased risk of heart attacks and strokes.

As a result, it’s important to limit your sodium intake, especially if you’re at a higher risk of these conditions.

Nevertheless, sodium is an essential mineral, but many diets and foods these days contain it in too high quantities, making it crucial to control your sodium intake for good health.


Another important thing to remember about all versions of tuna fish is that it’s rich in mercury. This element is naturally present in many foods, but fish and seafood contain a lot more.

Since doctors don’t recommend taking in too much mercury due to health risks, it’s best to limit your intake of fish and seafood particularly high in mercury.

Nevertheless, eating tuna or other types of fish once or twice a week won’t pose any health risks, and it will provide you with many nutrients and vitamins you wouldn’t get otherwise.

Is canned tuna bad for acid reflux?

Is canned tuna bad for acid reflux?
Is canned tuna bad for acid reflux?

Generally, canned tuna is as good for those suffering from acid reflux and GERD as a fresh one. However, there are some exceptions.

For example, canned tuna is higher in sodium, which can upset your stomach, causing an increased production of stomach acid, which then will reflux up your esophagus.

As a result, when buying canned tuna, make sure to check the list of ingredients and choose the brand that contains the least amount of salt.

On top of that, canned tuna is often packed with oil, slowing down digestion, thus leading to heartburn and acid reflux.

It may not be the case for everyone, but limiting your intake of tuna packed with oil might still be beneficial. This is especially true if you’re sensitive to oily foods.

On the other hand, tuna packed with water doesn’t cause the same problems.


Tuna is a healthy fish loaded with omega-3 fatty acids and many minerals. It’s also an inexpensive way to add more protein to your diet and stay healthy. In addition, this fish is not very acidic, so you can safely incorporate it into a low-acid diet without worsening any symptoms.

Nevertheless, the fish may still upset your stomach if you consume too much or if you’re particularly sensitive. So as always, add new foods to your diet slowly.

Don’t know what to drink? We made a list of more than 20 most and least acidic juices and 20+ alcoholic drinks ranked by acidity levels.