Tuna (Canned in Water)
Carb-free protein at a low calorie cost; canning in water rather than oil is the only processing step.
FatTonic Facts
Tuna (Canned in Water) · per serving 100g drained
Excellent · strongly supports fat-burning
| Factor | Amount | Points |
|---|---|---|
| Start | 100.0 | |
| Glycemic load | 0 | 0.0 |
| Sugar (g) | 0 | 0.0 |
| Processing | minimal | −8.0 |
| Fiber (g) | 0 | 0.0 |
| Protein (g) | 26 | +18.2 |
| Capped at 100 | raw 110.2 | = 100 |
| Glycemic index | not tested | |
| Carbs (g) | 0 | |
| Fat (g) | 1 |
Score model v1
Nutrients: USDA FoodData Central, record 171986 (Fish, tuna, light, canned in water, without salt, drained solids), public domain, checked 2 Oct 2026.
Glycemic index: not tested — too little carbohydrate to test (University of Sydney GI FAQ); the score assumes 0.
Per 100 g (USDA record; serving 100 g): carbs 0, sugar 0, fiber 0, protein 25.5, fat 0.8 g.
What this means for fat-burning
Why this score: protein 26 g set it, +18.2 points. Source: USDA FoodData Central, FDC 171986.
Its protein content supports satiety and helps preserve muscle while you lose fat.
See how your whole day scores — free Metabolic Score →This food and 199 more, scored on your phone.
Among the 200 rated foods
Tuna (Canned in Water) scores 100, rated Excellent. It scores higher than 75% of the 200 rated foods.
Rated foods per band: Avoid 0–19: 11; Poor 20–39: 23; Moderate 40–59: 34; Good 60–79: 45; Excellent 80–100: 87.
Frequently asked questions
Does tuna (canned in water) spike insulin?
Glycemic load 0 for 100g drained; FatTonic Score 100/100 — it strongly supports fat-burning.
Is tuna (canned in water) good for fat loss?
Excellent (100/100): tuna (canned in water) strongly supports fat-burning.
Better in protein
Tuna (Canned in Water) ties for the best in protein on this index.