Food database · Protein supplements
Protein content
16.7 g of protein in 1 scoop (28.7 g) of whey protein isolate, or 16.2 g for every 100 kcal it supplies.
Share of this food's calories that come from protein - it is extremely protein-dense.
| Protein per 100 kcal | 16.2 g |
|---|---|
| Protein per 100 g | 58.1 g |
| Protein per serving | 16.7 g in 1 scoop (28.7 g) |
| Calories from protein | 65% |
| Protein to fat | 50.1 g per 1 g fat |
| Rank in protein supplements, per 100 kcal | 6th of 11 |
| Rank of all foods, per 100 g | 7th of 796 |
| Share of 50 g Daily Value | 33% per serving |
| Protein quality | Complete protein |
One 1 scoop, 16.7 g protein.
Every 100 kcal of whey protein isolate brings 16.2 g of protein. On that measure it ranks 6th of the 11 protein supplements in this database and 118th of all 796 foods on the site. Measured by weight instead, its 58.1 g per 100 g ranks 6th in its group.
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.
Weight for weight, whey protein isolate has 50.1 g of protein for each gram of fat (58.1 g against 1.16 g per 100 g).
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 quoted here is counted by piece at 28.7 g, and it covers about 33% of the 50 g FDA Daily Value for protein.
This row is the USDA entry for a whey isolate beverage powder, which is less protein-dense than the whey powder row here. Tubs sold as isolate are usually more concentrated than this record, and powders vary a lot by brand and by how much flavouring is mixed in, so read your own label.
Serving sizes
| Portion | Weight | Protein | Calories |
|---|---|---|---|
| 100 g | 100 g | 58.1 g | 359 kcal |
| 1 scoop (serving used here) | 28.7 g | 16.7 g | 103 kcal |
| 3 scoop | 86 g | 50 g | 309 kcal |
Portion weights are the household measures listed on the USDA record; protein and calories scale from the per-100 g figures.
Related
Highest-protein protein supplements per serving · Most protein-dense foods · Highest protein per 100 g
Head to head
Quick answers
58.1 g. The 1 scoop serving used on this page weighs 28.7 g and so carries 16.7 g.
16.2 g. That figure divides its 58.1 g of protein per 100 g by its 359 kcal per 100 g, so it does not depend on serving size.
Yes. The protein in whey protein isolate supplies all nine essential amino acids in adequate amounts, so it can carry a meal's protein on its own.
About 33%. One 1 scoop serving has 16.7 g, and the FDA Daily Value for protein is 50 g.
Figures from USDA FoodData Central record #173177 (Beverages, Whey protein powder isolate), SR Legacy data. USDA data is in the public domain. Values are the published reference figures for that record, not lab measurements for a specific brand or batch.