Chewing-gum

Chewing-gum by Orbit has 155 kcal per 100 g.

Chewing-gum contains 0.1 g of protein per 100 g.

Yes — carbohydrates provide 99% of its calories (63.2 g per 100 g, of which 0.1 g is sugar).

Yes — only 0.1 g of sugar per 100 g. Most of its 63.2 g of carbs come from starch and fiber rather than sugar.

Yes — just 40 mg per 100 g (2% of the daily value), which qualifies as low sodium.

Nutri-Score weighs negatives (calories, sugar, saturated fat, sodium) against positives (fiber, protein) per 100 g. It collects almost no negative points (low sugar, saturated fat and sodium). Overall that places it in band B.

About 65 g of Chewing-gum equals 100 kcal.

Per 100 g it has 0.1 g sugar and 0.1 g fat (0.1 g saturated). Fat provides 1% of its calories, so portion size matters most here.