| Measure | Soy protein powder | Whey protein powder |
|---|---|---|
| Typical serving | 1 scoop (45 g) | 1 scoop (26 g) |
| Protein per serving | 25 g | 20.3 g |
| Protein per 100 g | 55.6 g | 78.1 g |
| Calories per serving | 175 kcal | 92 kcal |
| Protein density | 57% of calories | 89% of calories |
| Share of 50 g Daily Value | 50% | 41% |
| Protein quality | Complete | Complete |
| Category | Protein supplements | Protein supplements |
Compare foods · Soy protein powder · Whey protein powder
Protein comparison
Soy protein powder vs Whey protein powder: which has more protein?
Soy protein powder gives you 25 g of protein per 1 scoop; whey protein powder gives you 20.3 g per 1 scoop. On equal weight it is 55.6 g against 78.1 g per 100 g. The full side-by-side, from the same USDA-sourced records as the rest of the site:
The verdict
Whey protein powder has more protein on equal weight: 78.1 g per 100 g against soy protein powder's 55.6 g, a lead of 22.5 g. The order flips per serving because the servings differ in size: per typical serving, soy protein powder delivers 25 g (1 scoop) to whey protein powder's 20.3 g (1 scoop), a difference of 4.7 g.
For the full breakdown of each food, see the protein in soy protein powder and protein in whey protein powder pages, each with its USDA FoodData Central record id.
Quick answers
Soy protein powder vs Whey protein powder FAQ
Which has more protein, soy protein powder or whey protein powder?
Whey protein powder has more protein per 100 g: 78.1 g against 55.6 g. Per typical serving, soy protein powder provides 25 g (1 scoop) and whey protein powder provides 20.3 g (1 scoop).
Is soy protein powder or whey protein powder more protein-dense?
Whey protein powder is the more protein-dense of the two: about 89% of its calories come from protein, against 57% for soy protein powder.
Are soy protein powder and whey protein powder complete proteins?
Yes, both. Soy protein powder and whey protein powder each supply all nine essential amino acids in adequate amounts, so either can carry a meal's protein on its own.
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