Food database · Protein supplements
Protein content
A 1 scoop serving of whey protein isolate contains 16.7 g of protein - a very good source of protein, about 33% of the 50 g Daily Value.
Share of this food's calories that come from protein - it is extremely protein-dense.
| Serving | 1 scoop (28.7 g) |
|---|---|
| Protein per serving | 16.7 g |
| Protein per 100 g | 58.1 g |
| Calories per serving | 103 kcal |
| Protein density | 65% of calories |
| Share of 50 g Daily Value | 33% |
| Protein quality | Complete protein |
| Category | Protein supplements |
| Food type | Prepared / processed |
| USDA record | FoodData Central #173177 |
A typical 1 scoop serving of whey protein isolate contains 16.7 grams of protein (58.1 g per 100 g), which makes it a very good source of protein. That covers roughly 33% of the 50 g reference Daily Value, so it can anchor a high-protein meal for the day.
About 65% of the calories in whey protein isolate come from protein, which makes it extremely protein-dense - close to the practical ceiling for a whole food. Foods in this band are the ones that let you raise your protein intake without raising your calorie intake much at all.
Among the 11 protein supplements in the database, whey protein isolate ranks 6th by protein per serving, and 210th out of all 796 foods on the site. Set against protein bar, another protein supplement entry in the database, a serving carries about 0.6 g more protein (protein bar has 16.1 g per 1 bar).
It is a complete protein - it supplies all nine essential amino acids in adequate amounts, so it can carry a meal's protein on its own. The serving above is counted by piece at 28.7 g. Because pieces vary, the per-100 g figure is the one to use when comparing this against a food measured a different way.
Isolate is filtered further than concentrate, so it carries more protein and less lactose per scoop.
Source: USDA FoodData Central #173177 - "Beverages, Whey protein powder isolate" (SR Legacy, published 4/1/2019). Values are the published reference figures for that record, not lab measurements for a specific brand or batch.
Quick answers
Whey protein isolate has 58.1 g of protein per 100 g. A typical 1 scoop serving (28.7 g) provides 16.7 g.
Yes. Whey protein isolate is a complete protein - it supplies all nine essential amino acids in adequate amounts, so it can carry a meal's protein on its own.
A 1 scoop serving of whey protein isolate contains 16.7 g of protein, about 33% of the 50 g reference Daily Value.
Whey protein isolate is a very good source of protein, and about 65% of its calories come from protein, which makes it extremely protein-dense. Set against protein bar, another protein supplement entry in the database, a serving carries about 0.6 g more protein (protein bar has 16.1 g per 1 bar).
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