Flaxseed

Flaxseed by 365 Whole Foods Market has 577 kcal per 100 g. One serving (26 g) is about 150 kcal.

Flaxseed contains 23.1 g of protein per 100 g — about 6 g per 26 g serving.

Yes — 23.1 g of protein per 100 g, supplying 16% of its calories. That makes it an excellent protein source.

Yes — only 0 g of sugar per 100 g. Most of its 30.8 g of carbs come from starch and fiber rather than sugar.

Yes — just 58 mg per 100 g (3% of the daily value), which qualifies as low sodium.

It provides 23.1 g of fiber per 100 g — 82% of the daily value, making it a high-fiber food.

Nutri-Score weighs negatives (calories, sugar, saturated fat, sodium) against positives (fiber, protein) per 100 g. Points against come from calorie density (577 kcal), saturated fat (3.8 g); points in favor come from fiber (23.1 g), protein (23.1 g). Overall that places it in band B.

About 17 g of Flaxseed equals 100 kcal. It is energy-dense, so small amounts add up quickly.