Tuna fish offers incredible health benefits, such as strengthening your heart, boosting your brain power and preventing life threatening diseases such as cancer. It’s full of vitamins and minerals, but low in fat and sugar, making it the perfect healthy addition to sushi, salads and sandwiches. When seared, it’s a delicious main meal, offering the best of both worlds in every melting mouthful.
Here are 10 health benefits of tuna fish:
1..It’s Good for Your Heart
In order to keep Omega 6 fatty acids and cholesterol levels in check, our bodies need a steady supply of Omega 3’s, and tuna is a rich source of it. Being an incredibly lean meat makes tuna a great replacement for other fatty proteins, which will also help to keep your heart free from damage.
2. It’s a Super Source of B12
Vitamin B12 is the most common deficiency in modern diets, and it’s an essential vitamin for nerve, blood and brain health. Tuna offers 153% of the daily recommended value of B12 per 85 gram portion, which means eating it just a few times a week will prevent fatigue, stress and hormonal imbalance.
3. It’s Excellent for Eyesight
Your eyes need essential fatty acids, antioxidants and sufficient Vitamin A to stay healthy, and tuna offers all three of these. Vitamin A helps to prevent cataracts and night blindness, antioxidants prevent free radical damage and essential fatty acids keep your eyeballs in tip top shape.
4. It’s a Great Source of Iron 
The silvery bits of tuna as well as the moist, pink flesh contains decent amounts of iron, which is important for the performance of your red blood cells. Red blood cells are the oxygen transporters in the body, helping to keep your brain and vital organs well nourished with life giving oxygen.
5. It’s Great for Muscle Strength
Tuna is 60% pure protein, which offers your muscles the amino acids that it requires to build, repair and gain strength. It’s also really lean, helping you to become exactly what you eat: lean and strong!
6. It’s Low in Calories
Tuna contains 30% less calories than other meats, which makes it an excellent low calorie source of strength and satiation. Each 100 grams offers 180 calories, which makes it a great choice with some veggies or salad.
7. It Reduces Muscle Cramps
Magnesium reins the fitness world, being one of the most important minerals in preventing fatigue, stress and muscle cramps. Tuna is a great source of magnesium, helping to build and repair muscles after each workout.
8. It’s Low Carbohydrate Friendly
This delicious, filling meat offers zero carbohydrates, which makes it the perfect meal for low-carb eating plans. Containing no sugar or starch has been proven to reduce glycogen stores, which helps to shift the scale in a favorable direction. 
9. It’s Selenium Rich
100 grams of tuna fish contains 177% of the recommended daily value of selenium, which in an important mineral for better brain, nerve and reproductive health. Studies have proven that a diet rich in selenium can improve fertility, which is great news for anyone wanting to start a strong and healthy family.
10. It’s A Great Source of Vitamin D
Vitamin D is a rarity in food, which can lead to a deficiency if we don’t get enough sunshine. It is an excellent support for bone health and blood sugar balance, as well as boosting your immune system.
Disclaimer: Tuna comes in multiple forms and brands, and some studies have shown that monitoring mercury levels can prevent toxicity in the body.
Sources:
https://en.wikipedia.org/wiki/Tuna
https://en.wikipedia.org/wiki/Vitamin_D
https://nutritiondata.self.com/facts/finfish-and-shellfish-products/4146/2
https://study.com/academy/lesson/what-is-selenium-benefits-foods-deficiency-symptoms.html
https://www.edf.org/oceans/mercury-alert-canned-tuna-safe-eat
