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High-protein, very low-carb fish rich in selenium and vitamin B12
CALORIES · 100 G
GI
POTASSIUM · 100 G
FIBER · 100 G
1 piece (medium) of Seared ahi tuna (120 g) has 173 calories. That works out to 144 calories per 100 g. It contains 0 g of carbs, 29.3 g of protein, 5.9 g of fat and 0 g of fiber. Its 96 µg of Selenium covers 175% of the Daily Value. Its glycemic index is 0 (low), so it raises blood sugar slowly.
Selected: 1 piece (medium) · 120 g
173
KCAL / 120G
Carbs
0g
· 0% DV
Protein
29.3g
· 59% DV
Fat
5.9g
· 8% DV
Fiber
0g
· 0% DV
DV is the share of the daily value covered, on a 2,000 kcal reference diet.
Calories come from: Carbs 0% · Protein 69% · Fat 31%
| Nutrient | Amount | % DV |
|---|---|---|
| Calories | 173 kcal | |
| Total fat | 5.9 g | 8% |
| Saturated fat | 1.56 g | 8% |
| Trans fat | 0 g | |
| Sodium | 47 mg | 2% |
| Total carbohydrate | 0 g | 0% |
| Fiber | 0 g | 0% |
| Protein | 29.3 g | 59% |
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 piece (medium) | 120 g | 173 kcal |
| 1 piece (small) | 80 g | 115 kcal |
| 100 g | 100 g | 144 kcal |
| 4 ounce (medium) | 113 g | 163 kcal |
| 1 serving (medium) | 150 g | 216 kcal |
| 6 ounce (large) | 170 g | 245 kcal |
| 1 piece (large) | 180 g | 259 kcal |
| 1 serving (large) | 220 g | 317 kcal |
Calculated from 144 calories per 100 g.
To make seared ahi tuna, pat the fish dry and cook it briefly in a very hot pan so the outside browns while the center stays rare or medium-rare. Use a pan large enough to avoid crowding, which can prevent proper searing.
Usually, yes: seared ahi tuna is browned on the outside and served raw or lightly cooked in the center. If you want it fully cooked, leave it in the pan longer, though the lean fish can become dry.
Ahi usually refers to yellowfin tuna or bigeye tuna, both used for seared ahi tuna. The exact species can vary by restaurant or supplier, so ask which one is being served if the distinction matters to you.
Yes, seared ahi tuna is commonly served rare, but the fish should come from a reliable source and have been handled for raw or undercooked eating. “Sushi-grade” is not a regulated guarantee of safety, so ask the fishmonger about its handling.
Sear ahi tuna briefly on each side in a very hot pan; the time depends on the steak’s thickness and how rare you want the center. Drying the surface first helps it brown instead of steaming.
A soy-ginger or citrus-based sauce pairs well with seared ahi tuna without overwhelming its flavor. Sesame, scallions, ponzu, and a small amount of wasabi are also common accompaniments; serve richer sauces on the side.
Refrigerate leftover seared ahi tuna in a covered container within two hours, and eat it within three to four days. Because the center may be rare, keep it cold during serving and avoid leaving leftovers at room temperature.
Thaw ahi tuna in the refrigerator before searing so it cooks evenly and its surface can be dried. If you plan to serve it rare, choose fish handled for raw or undercooked consumption rather than assuming any frozen tuna is suitable.
Rare seared ahi tuna is best avoided during pregnancy because its center is undercooked, and tuna can contain mercury. Advice depends on the species and how often you eat it, so ask your healthcare professional about safer cooked choices and portions.
Seared ahi tuna is a tuna steak cooked quickly at high heat, usually leaving the center rare; “tuna steak” simply describes the cut and does not specify how it is cooked. A tuna steak can also be grilled or cooked through.
Vitamins
B3
22.56mg · 141% DV
B12
3µg · 125% DV
B6
1.12mg · 66% DV
Vitamin D
6µg · 30% DV
Minerals
Selenium
96µg · 175% DV
Phosphorus
300mg · 43% DV
Potassium ⭐
516mg · 15% DV
Iodine
22µg · 15% DV
Sodium
47mg · 2% DV
GLYCEMIC INDEX
GLYCEMIC LOAD
Accounts for portion size — a more realistic measure than GI alone.
To burn the 173 calories in 1 piece (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.
Seared ahi tuna is a quick-cooked tuna steak associated with Hawaiian and Pacific cooking. “Ahi” commonly refers to yellowfin or bigeye tuna; the fish is seared over high heat so the outside browns while the centre stays pink and tender. Its savoury, clean flavour is often paired with a tangy or lightly sweet sauce.
It’s served sliced as a main, or over salad and grain bowls, and is also familiar in poke-inspired meals. A protein-rich choice with virtually no carbohydrates, it suits a lighter meal alongside greens and citrus. If you prefer it cooked through, leave it in the pan longer, though the texture will be firmer.
Very 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
✓ Suitable
Whole30
— Not suitable
DASH
— Not suitable
Keto
✓ Suitable
Low FODMAP
— Not suitable
SATURATED
1.56g
MONOUNSATURATED
1.68g
POLYUNSATURATED
0.6g
Omega 6:3 ratio 0.3:1
Below the ideal 4:1 — a good omega balance.
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Nutrition data compiled from USDA FoodData Central and scientific sources.