Mayo

Mayo has 704 kcal per 100 g.

Mayo contains 1.6 g of protein per 100 g.

With 1 g total carbs (about 0.6 g net carbs) per 100 g, it fits low-carb and keto eating patterns in normal portions.

It has 12.9 g of saturated fat per 100 g — 64% of the daily value, which counts as high.

Nutri-Score weighs negatives (calories, sugar, saturated fat, sodium) against positives (fiber, protein) per 100 g. Points against come from calorie density (704 kcal), saturated fat (12.9 g), sodium (400 mg). Overall that places it in band E.

About 14 g of Mayo equals 100 kcal. It is energy-dense, so small amounts add up quickly.

Yes — 704 kcal per 100 g makes it calorie-dense; a 50 g portion is already about 352 kcal.

Per 100 g it has 0.4 g sugar and 77.1 g fat (12.9 g saturated). Fat provides 98% of its calories, so portion size matters most here.