Special K Classic

Special K Classic by Kellogg's has 370 kcal per 100 g. One serving (20 g) is about 74 kcal.

Special K Classic contains 9.3 g of protein per 100 g — about 1.9 g per 20 g serving.

Yes — carbohydrates provide 86% of its calories (78 g per 100 g, of which 10.3 g is sugar). It also delivers 4.3 g of fiber.

It provides 4.3 g of fiber per 100 g — 15% of the daily value.

Nutri-Score weighs negatives (calories, sugar, saturated fat, sodium) against positives (fiber, protein) per 100 g. Points against come from calorie density (370 kcal), sugar (10.3 g), sodium (400 mg); points in favor come from fiber (4.3 g), protein (9.3 g). Overall that places it in band B.

About 27 g of Special K Classic equals 100 kcal. It is energy-dense, so small amounts add up quickly.

Yes — 370 kcal per 100 g makes it calorie-dense; a 50 g portion is already about 185 kcal.

Per 100 g it has 10.3 g sugar and 1.3 g fat (0.3 g saturated). Fat provides 4% of its calories, so portion size matters most here.