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Tuna is rich in protein, and pairing with onion adds flavor and nutrients.
In season: Spring · Summer · Autumn · Winter
CALORIES · 100 G
GI
POTASSIUM · 100 G
FIBER · 100 G
1 serving (medium) of Tuna fish with onion (120 g) has 144 calories. That works out to 120 calories per 100 g. It contains 3.4 g of carbs, 25.8 g of protein, 2.6 g of fat and 0.8 g of fiber. Its 2.5 µg of B12 covers 105% of the Daily Value. Its glycemic index is 15 (low), so it raises blood sugar slowly.
Selected: 1 serving (medium) · 120 g
144
KCAL / 120G
Carbs
3.4g
· 1% DV
Protein
25.8g
· 52% DV
Fat
2.6g
· 3% DV
Fiber
0.8g
· 3% DV
DV is the share of the daily value covered, on a 2,000 kcal reference diet.
Calories come from: Carbs 10% · Protein 74% · Fat 16%
| Nutrient | Amount | % DV |
|---|---|---|
| Calories | 144 kcal | |
| Total fat | 2.6 g | 3% |
| Saturated fat | 0.6 g | 3% |
| Trans fat | 0 g | |
| Sodium | 336 mg | 15% |
| Total carbohydrate | 3.4 g | 1% |
| Fiber | 0.8 g | 3% |
| Protein | 25.8 g | 52% |
Calories: Calories measure energy. Average daily need is 2,000 kcal. Excess calories are stored as fat, too few cause weight loss.
Carbs: Your body's primary energy source. The brain runs exclusively on carbs. Daily need: 275g.
Protein: Essential for muscle repair and cell growth. Daily need: 50g. Keeps you full and boosts metabolism.
Fat: Needed for hormone production and vitamin absorption. Daily need: 78g. Limit saturated fats, choose unsaturated.
Fiber: Critical for digestive health and satiety. Daily need: 28g. Stabilizes blood sugar, lowers cholesterol.
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| Serving | Amount | Calories |
|---|---|---|
| 1 serving (medium) | 120 g | 144 kcal |
| 1 serving (extra small) | 60 g | 72 kcal |
| 1 serving (small) | 80 g | 96 kcal |
| 1 can (small) | 80 g | 96 kcal |
| 100 g | 100 g | 120 kcal |
| 1 piece (whole) | 100 g | 120 kcal |
| 1 pack (medium) | 100 g | 120 kcal |
| 1 can (medium) | 160 g | 192 kcal |
| 1 serving (large) | 180 g | 216 kcal |
| 1 serving (jumbo) | 250 g | 300 kcal |
Calculated from 120 calories per 100 g.
Mix drained tuna with finely chopped onion, then add lemon juice and black pepper. Parsley works well too. If the onion tastes too sharp, soak it briefly in lemon juice before mixing it in.
Red onion is a popular choice because its mild bite and color work well in a cold tuna salad. Yellow onion has a stronger flavor; slice it finely or rinse it briefly if you want a gentler result.
Yes, tuna with onion is commonly made with raw onion. Chop the onion finely so it mixes evenly, or let it sit in lemon juice for a few minutes to soften its sharp flavor.
Lemon juice, parsley, and black pepper are simple additions to tuna with onion. For a fuller salad, add chopped celery, tomato, or cucumber; for a sandwich filling, keep watery vegetables separate until serving.
Tuna with onion works well in a sandwich or wrap, over leafy greens, or alongside crackers. Serve it with lemon and fresh vegetables for a light meal, and keep the mixture chilled until you eat.
Yes, onion can balance tuna’s strong savory flavor, especially when paired with lemon or herbs. It cannot make spoiled fish safe or fresh, so discard tuna with an unusually sour or unpleasant odor.
Yes, you can briefly warm tuna with onion, though the combination is more often served cold. Add the onion near the end of cooking to keep it from becoming overly soft, and heat opened tuna thoroughly.
Keep tuna with onion in a covered container in the refrigerator and eat it within a day for the best texture. Do not leave it at room temperature for an extended period, particularly after opening the tuna.
Yes, tuna can be eaten during pregnancy in appropriate amounts, but its mercury content varies by species and product. Follow local guidance on tuna types and portions, and ask your prenatal care professional if you are unsure.
Yes, you can mix tuna with onion a few hours ahead and refrigerate it in a sealed container. The onion releases moisture as it sits, so add it closer to serving if you want the tuna mixture to stay firm.
Vitamins
B12
2.52µg · 105% DV
B3
9.36mg · 59% DV
B6
0.72mg · 42% DV
B2
0.23mg · 18% DV
Minerals
Selenium
46µg · 84% DV
Phosphorus
216mg · 31% DV
Iodine
38µg · 25% DV
Sodium
336mg · 15% DV
Potassium ⭐
324mg · 10% DV
GLYCEMIC INDEX
GLYCEMIC LOAD
Accounts for portion size — a more realistic measure than GI alone.
To burn the 144 calories in 1 serving (medium) (120 g):
🚶
Walking (5 km/h)
🏃
Running (8 km/h)
🚴
Cycling
🏊
Swimming
Times are calculated with the MET equation for a 70 kg adult. Actual burn varies with your weight, age and pace.
Çiyalı ton balığı is tuna prepared with chia seeds; despite the English page label, it is not tuna with onion. The tuna brings a firm, savoury bite, while chia adds a mild, earthy note and softens into a gel-like texture when mixed with liquid.
Serve it in a salad with leafy greens and lemon, tuck it into a sandwich, or offer it as a simple lunch or supper. It is protein-rich and relatively low in carbohydrate. For a lighter meal, use lemon or yoghurt instead of a rich mayonnaise dressing and pair it with plenty of vegetables.
High
How many vitamins, minerals and how much fiber this food carries per calorie. A high score means a lot of nutrition for few calories.
High
An EatBetter score computed from fiber, protein and calorie density. A high score means staying full longer on the same calories.
Both scores are calculated per 100 g and do not change with the selected portion. The satiety score is EatBetter's own calculation, not a clinical measure.
NOVA 2
Minimally Processed
1. Unprocessed
2. Minimally Processed
3. Processed
4. Ultra-Processed
NOVA classifies foods into 4 groups by industrial processing. NOVA 1 (unprocessed) is the healthiest.
Contains these allergens:
Vegan
— Not suitable
Vegetarian
— Not suitable
Gluten-Free
✓ Suitable
Dairy-Free
— Not suitable
Mediterranean
✓ Suitable
Paleo
✓ Suitable
Whole30
— Not suitable
DASH
— Not suitable
Keto
✓ Suitable
Low FODMAP
— Not suitable
SATURATED
0.6g
MONOUNSATURATED
0.72g
POLYUNSATURATED
0.84g
Omega 6:3 ratio 0:1
Below the ideal 4:1 — a good omega balance.
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Nutrition data compiled from USDA FoodData Central and scientific sources.