Tuna has been the favorite of seafood lovers for decades, and that’s because it not only has a delicious flavor but also an impressive nutritional profile.
No matter how you prefer eating fish – grilled, seared, or added to your favorite salad — tuna proves to be a good choice for a lean protein source that supports heart health, brain function and overall vitality.
According to a recent study based on 2,50,000 participants, the higher levels of omega-3s and omega-6 in Tuna are associated with reduced risk of 14 types of cancers, such as colon, brain, lungs, stomach, and bladder cancers.(1)
It won’t be wrong to call it seafood like tuna, a superfood, as it is power-packed with omega-3 fatty acids, vitamins, and minerals.
In this article, we will look at the 10 remarkable tuna benefits for health, some of its risks & how you can include it in delicious ways in your diet.
So without further ado, let’s dive into it!
What is Tuna?
Tuna is a saltwater fish belonging to the Thunnus genus and is widely known for having high-quality, rich protein, omega-3 fatty acids (EPA and DHA), and mild flavour. The popular varieties include yellowfin, skipjack, albacore (white tuna) & bluefin. All these varieties slightly differ in their size, flavour, and fat content.
Tunas are available worldwide in three forms: Fresh, frozen, and canned, and that’s mainly due to their versatility and nutritional value. They are amongst the most convenient choices for a healthy diet.
Tuna Nutrition Facts (Per 100g)
Tuna is an excellent source of nutrients, including protein, healthy fats, vitamins, and minerals that are required to maintain overall health.
The nutritional values shared below are for 100 g of raw tuna; the actual values depend on the species and the cooking methods you choose.
- Calories: ~130 kcal
- Protein: ~24–29 g
- Total Fat: ~1–3 g
- Carbohydrates: 0 g
- Omega-3 Fatty Acids (EPA & DHA): ~300–500 mg*
- Vitamin B12: ~2.5 µg (104% DV)
- Vitamin D: ~2–5 µg (10–25% DV)
- Niacin (Vitamin B3): ~18 mg (113% DV)
- Vitamin B6: ~0.9 mg (53% DV)
- Phosphorus: ~250 mg (20% DV)
- Potassium: ~400 mg (9% DV)
- Magnesium: ~35 mg (8% DV)
- Selenium: ~80–90 µg (145–165% DV)
(*Omega-3 content varies depending on the tuna species.)
The health benefits of consuming tuna stand apart due to its lean protein content with very little fat and carbohydrates, making it an ideal choice for a balanced diet.
10 Health Benefits of Tuna
Supports Heart Health
Tuna, being one of the best omega-3-rich fish, packs a punch of omega-3 fatty acids, which maintain the balance of cholesterol in your body.
These healthy fats are known to increase the level of good cholesterol, known as HDL, while decreasing the amount of omega-6 fatty acids and bad cholesterol, known as LDL.
In addition, the Polyunsaturated fat present in it also improves your blood circulation and prevents the buildup of plaque in your arteries.
If you regularly consume it, you might be able to decrease the risk of developing cardiovascular disease, like heart attacks and strokes & this makes it one of the best health benefits of eating tuna fish.
Promotes Brain Health
Tuna contains a type of omega-3 fatty acid known as DHA (docosahexaenoic acid), which is linked to the improvement of your brain function and development.
This DHA provides tuna health benefits in the form of memory, concentration, and cognitive performance.
By regular consumption of Tuna, you might be able to avoid some of the neurodegenerative diseases like Alzheimer’s and dementia.
It is because they protect your nerve cells from inflammation and oxidative damage.
Supports Weight Loss
Tuna is high in protein but is low in fats and calories, making it a perfect option for individuals looking for weight management.
Protein can make you feel full for longer, along with supporting your muscle repair and growth, thus boosting your metabolism & preserving muscle mass.
Tuna is a good substitute for high-calorie meats as it can help you reduce your calorie intake without compromising on nutrition.
Boosts Your Immune System
It is an excellent Source of vitamin B12, zinc, and selenium that boosts your immune system, DNA synthesis and repair.
These essential vitamins and minerals are known to enhance the production of white blood & red blood cells, especially selenium, making your body capable of fighting various infections.
Consume it on an everyday basis if you want to strengthen your defense mechanism, along with keeping your immune system resilient.
Boosts Your Energy Levels
Tuna is a great source of B vitamins, especially Niacin (B3) and vitamin B-12.
They play a vital role in turning the food you eat into usable energy.
So, as a result, it will make you feel less fatigued and support normal energy metabolism.
Supports Eye Health
The omega-3 that Tuna contains is also responsible for supporting your eye health by preventing macular degeneration, which is known to cause vision loss by damaging the retina in older people.
The other nutrients it consists of support your retinal functioning and protect the delicate tissues of your eyes from oxidative stress & from developing dry eyes.
Regulates Blood Pressure
The potassium and omega-3 that are present in tuna help you maintain your blood pressure levels.
Potassium relaxes your blood vessels, resulting in improved blood flow and a reduction of stress on your cardiovascular system.
It’s a combination of omega-3s that can help you avoid hypertension risk and support your overall health.
Protects You from Cell Membrane Damage
The omega-3 fatty acids and antioxidants present in tuna protect your body from oxidative stress.
This, as a result, helps in maintaining the integrity of your cells, supports tissue repair, and slows down the aging process.
Including tuna in your healthy diet can help your organs function better and also recover quickly from physical exertion.
Improves Your Hair and Skin Texture
The powerful combination of proteins, omega-3s, and antioxidants that tuna contains helps nourish your skin and hair from within.
Omega-3 maintains the elasticity of your skin and keeps it hydrated, while protein strengthens hair follicles.
Consuming Tuna helps maintain healthy skin, reduce inflammation, and get shinier and stronger hair.
Supports Cellular Health
Tuna also contains an essential mineral, selenium, which works as an antioxidant.
It helps reduce oxidative damage, known to lead to cancer growth, by neutralizing the radicals in the body.
Its omega-3 is extremely useful in lowering inflammation, which is known to cause chronic diseases like cancer.
Some Risks Associated with Tuna
Yes, Tuna contains all the essential nutrients beneficial for your health, but it also possesses some risks, which is important for you to know.
Large species like Yellowfin and albacore are known to have higher mercury content, which can affect your nervous system and brain health over time.
If you prefer canned tuna, you should be aware of its high sodium content, which can lead to an increased level of blood pressure if eaten frequently.
If tuna is stored improperly, there is a high chance that it will develop the risk of histamine-related food poisoning.
While trace levels of environmental contaminants like PCBs and dioxins could contribute to hormonal or liver issues.
So be cautious if you’re susceptible to fish allergies.
| Watch the Video (For Canned Tuna lovers) |
(Source – Times)
How to Include Tuna in Your Diet
Buying tips:
- Opt for smaller varieties like skipjack tuna or canned light tuna because they tend to have low mercury levels.
- Check for the freshness of tuna fillets, are they red or pink in color? Do they have a moist texture and clean ocean scent? Avoid the ones with a strong fishy odor.
- Prefer the ones with the label that mentions “wild-caught”, pole-and-line caught, or “dolphin-safe” for sustainable and eco-friendly choices.
- Ensure to read the ingredients. Prefer water-packed tuna for low calories or in olive oil for that extra added healthy fats.
Preparation tips:
- Thaw frozen tuna in your refrigerator overnight, but ensure that it is below room temperature, as it can lead to the risk of bacterial growth.
- Use a paper towel to completely pat dry the fillets before cooking so that you can sear them evenly.
- Fresh tuna cooks quickly for steak. If possible, aim for a medium-rare center with seared outside and slightly pink inside, as it will help you maintain its juice and flavor.
- Instead of deep-frying, opt for healthier cooking methods such as steaming, baking, grilling, or pan-searing.
- Use lemon juice, herbs, garlic, or olive oil if you want to enhance its flavor while keeping the dish light.
- If you are using canned tuna, you can prepare tuna salad, sandwiches, or wraps – it pairs perfectly with fresh veggies and whole grains.
Tuna vs. Other Indian Fish
If fresh tuna is not available, you can opt for Surmai or Bangda as they are among the most popular alternatives to tuna in India.
| Nutrient | Tuna | Surmai (Seer Fish) | Bangda (Indian Mackerel) |
| Protein | 23.6 g | 20–22 g | 18.5 g |
| Omega-3 Fatty Acids | 150 mg to over 1,500 mg | 1–1.5 g | 2.2 g |
| Vitamin B12 | 1.1 mcg | 2–3 mcg | 12 µg |
| Selenium | 66 mcg | 30–40 mcg | 36 µg |
| Mercury Level | Moderate* | Moderate | Low |
Final Thoughts
Tuna is not only a tasty seafood but a nutrient-dense option that supports each and every aspect of your health.
When prepared in the right way and eaten in moderation, it can prove to be the cornerstone of your healthy and balanced diet.
So the next time you prepare your weekly meals, don’t forget to add this protein-packed fish to your list to enjoy its taste and reap its health rewards.
Frequently Asked Questions – Advantages of Eating Tuna
Is tuna healthy?
Yes, without a doubt. Tuna is good for health because of its content, like protein, omega-3s, and Vitamin D for bone health, and it also contains other essential nutrients that support your overall health.
How often should you eat tuna?
FDA recommends consuming 1-2 servings of tuna per week & around 8 to 12 ounces (226 to 340g) for healthy individuals. Opt for skipjack or canned light tuna, as they have less mercury in comparison with albacore and bigeye tuna. Women who are pregnant or breastfeeding & young children should opt for fish with low mercury and follow local dietary guidelines.
What are some side effects of tuna?
Upon oversoncuming it, you might have to face some potential side effects like mercury poisoning, allergic reactions, gastrointestinal issues, and possible interactions with certain medications like blood thinners.
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