Gold Standard 100% Isolate

Gold Standard 100% Isolate by Optimum Nutrition has 355 kcal per 100 g. One serving (31 g) is about 110 kcal.

Gold Standard 100% Isolate contains 80.6 g of protein per 100 g — about 25 g per 31 g serving.

Yes — 80.6 g of protein per 100 g, supplying 92% of its calories. That makes it an excellent protein source.

With 3.2 g total carbs (about 3.2 g net carbs) per 100 g, it fits low-carb and keto eating patterns in normal portions.

Yes — 622.8 mg of sodium per 100 g, about 27% 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 (355 kcal), sodium (622.8 mg); points in favor come from protein (80.6 g). Overall that places it in band C.

About 28 g of Gold Standard 100% Isolate equals 100 kcal. It is energy-dense, so small amounts add up quickly.

Yes — 355 kcal per 100 g makes it calorie-dense; a 50 g portion is already about 178 kcal.