Dead heat · 8 categories decided · 1 tie
Bluefin tuna, cooked: 100 g · Herring, cooked: 100 g.
The verdict
It's a dead heat — each wins 4 of 8 match-ups.
Pick Bluefin tuna, cooked for more protein, less saturated fat, less sodium and more magnesium.
Pick Herring, cooked for more potassium, more calcium, more iron and more vitamin C.
Evenly matched on fiber.
Head-to-head
- Energy184 kcal203 kcal
- Proteinmore is betterWIN29.91 g23.03 g
- Carbohydrate0 g0 g
- Fibermore is better0 g0 g
- Total sugarsless is better—0 g
- Total fat6.28 g11.59 g
- Saturated fatless is betterWIN1.61 g2.62 g
- Sodiumless is betterWIN50 mg115 mg
- Potassiummore is better323 mg419 mgWIN
- Calciummore is better10 mg74 mgWIN
- Ironmore is better1.31 mg1.41 mgWIN
- Magnesiummore is betterWIN64 mg41 mg
- Vitamin Cmore is better0 mg0.7 mgWIN
- Vitamin Dmore is better——
Winners are decided by deterministic per-metric rules on the stated basis; ties and missing data don’t score (missing ≠ zero). Educational information only — not medical advice.

