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High-protein, low-carb salad with omega-3 fats
In season: Summer · Autumn
CALORIES · 100 G
GI
POTASSIUM · 100 G
FIBER · 100 G
1 serving (medium) of Tomato onion tuna salad (180 g) has 212 calories. That works out to 118 calories per 100 g. It contains 8.6 g of carbs, 22.7 g of protein, 9.7 g of fat and 2.2 g of fiber. Its 2.9 µg of B12 covers 120% of the Daily Value. Its glycemic index is 20 (low), so it raises blood sugar slowly.
Selected: 1 serving (medium) · 180 g
212
KCAL / 180G
Carbs
8.6g
· 3% DV
Protein
22.7g
· 45% DV
Fat
9.7g
· 12% DV
Fiber
2.2g
· 8% DV
DV is the share of the daily value covered, on a 2,000 kcal reference diet.
Calories come from: Carbs 16% · Protein 43% · Fat 41%
| Nutrient | Amount | % DV |
|---|---|---|
| Calories | 212 kcal | |
| Total fat | 9.7 g | 12% |
| Saturated fat | 1.62 g | 8% |
| Trans fat | 0 g | |
| Sodium | 378 mg | 16% |
| Total carbohydrate | 8.6 g | 3% |
| Fiber | 2.2 g | 8% |
| Protein | 22.7 g | 45% |
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) | 180 g | 212 kcal |
| 1 ounce (mini) | 28 g | 33 kcal |
| 1 piece (half) | 90 g | 106 kcal |
| 100 g | 100 g | 118 kcal |
| 1 serving (small) | 120 g | 142 kcal |
| 1 cup (chopped) | 160 g | 189 kcal |
| 1 piece (whole) | 180 g | 212 kcal |
| 1 serving (large) | 280 g | 330 kcal |
| 2 cup (chopped) | 320 g | 378 kcal |
Calculated from 118 calories per 100 g.
To make tomato onion tuna salad, combine chopped tomatoes and onion with drained tuna. Dress it with olive oil, lemon juice, salt, and pepper, then toss just before serving so the tomatoes stay fresh rather than watery.
Tomatoes, onion, and tuna are the core ingredients in tomato onion tuna salad. Olive oil and lemon are common additions; parsley, cucumber, or olives also work well. Add the dressing shortly before serving to keep the salad crisp.
Yes, drain canned tuna before adding it to tomato onion tuna salad. Excess liquid can dilute the dressing and make the tomatoes seem watery. If the tuna is packed in oil, reserve or discard the oil according to your preferred richness.
Yes, tomato onion tuna salad is often made without mayonnaise. Olive oil and lemon juice give it a lighter, sharper dressing that suits the fresh tomatoes and onion; add mayonnaise only if you prefer a creamy variation.
Tomatoes release juice after they are cut, and salt draws out more moisture. For less liquid in tomato onion tuna salad, chop the tomatoes just before serving and wait to add salt and dressing until the last moment.
To make the onion milder in tomato onion tuna salad, slice it thinly and soak it briefly in cold water, then drain and pat it dry. This softens its sharp bite without removing all of its flavor.
Keep tomato onion tuna salad in a covered container in the refrigerator and eat it within 1–2 days. Its texture is best on the day it is made, since the tomatoes soften and release liquid as they sit.
Serve tomato onion tuna salad with crusty bread, boiled potatoes, or crackers for an easy meal. It also works as a filling for a sandwich or wrap, though adding bread changes the meal from a low-carb option.
Tomato onion tuna salad can fit a weight-loss meal because tuna provides protein and the salad can be served without a heavy dressing. Keep added oil and calorie-dense sides in mind when building the rest of the meal.
Yes, cooked fresh tuna can replace canned tuna in tomato onion tuna salad. Let it cool, flake it into bite-size pieces, and fold it in gently. The salad will have a firmer texture and a less salty flavor than with canned tuna.
Vitamins
B12
2.88µg · 120% DV
B3
9.18mg · 57% DV
Vitamin C
17.64mg · 20% DV
B6
0.32mg · 19% DV
Minerals
Selenium
40µg · 73% DV
Phosphorus
270mg · 39% DV
Sodium
378mg · 16% DV
Copper
0.14mg · 16% DV
Potassium ⭐
504mg · 15% DV
GLYCEMIC INDEX
GLYCEMIC LOAD
Accounts for portion size — a more realistic measure than GI alone.
To burn the 212 calories in 1 serving (medium) (180 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.
Tomato onion tuna salad brings chopped tomatoes and onion together with tuna, usually dressed simply with olive oil and lemon. It is an easy home-prepared salad, often made with canned tuna, and may include herbs or other crisp vegetables.
The juicy, slightly sweet tomatoes balance the onion’s sharpness and the tuna’s savoury, substantial bite. Serve it as a light lunch, a side dish, or part of a Mediterranean-style spread; it goes well with crusty bread or leafy greens. It is high in protein and relatively low in carbohydrate, with omega-3 fats from the tuna. For a lighter dressing, use less oil and let lemon juice and herbs add freshness.
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.
Medium
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
— Not suitable
Whole30
— Not suitable
DASH
— Not suitable
Keto
✓ Suitable
Low FODMAP
— Not suitable
SATURATED
1.62g
MONOUNSATURATED
2.7g
POLYUNSATURATED
2.16g
Omega 6:3 ratio 5.1:1
Above the ideal 4:1 (5.1:1).
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Nutrition data compiled from USDA FoodData Central and scientific sources.