Mayonnaise leads 4–3 · 7 categories decided · 3 ties
Both foods compared at 100 kcal.
The verdict
Mayonnaise comes out ahead, winning 4 of 7 nutrient match-ups.
Pick Mayonnaise for more protein, less saturated fat, less sodium and more iron.
Pick Butter, whipped for less sugar, more potassium and more calcium.
Evenly matched on fiber, magnesium and vitamin C.
Head-to-head
- Energy100 kcal100 kcal
- Proteinmore is betterWIN0.15 g0.07 g
- Carbohydrate0.38 g0 g
- Fibermore is better0 g0 g
- Total sugarsless is better0.07 g0.01 gWIN
- Total fat11.07 g10.71 g
- Saturated fatless is betterWIN1.2 g6.21 g
- Sodiumless is betterWIN79.22 mg79.75 mg
- Potassiummore is better4.74 mg5.61 mgWIN
- Calciummore is better2.51 mg3.15 mgWIN
- Ironmore is betterWIN0.07 mg0.01 mg
- Magnesiummore is better0.14 mg0.14 mg
- Vitamin Cmore is better0 mg0 mg
- 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.

