Food database · Protein supplements
Protein content
A 1 oz serving of soy protein isolate contains 24.7 g of protein - a very good source of protein, about 49% of the 50 g Daily Value.
Share of this food's calories that come from protein - it is extremely protein-dense.
| Serving | 1 oz (28 g) |
|---|---|
| Protein per serving | 24.7 g |
| Protein per 100 g | 88.3 g |
| Calories per serving | 94 kcal |
| Protein density | 105% of calories |
| Share of 50 g Daily Value | 49% |
| Protein quality | Complete protein |
| Category | Protein supplements |
| Food type | Prepared / processed |
| USDA record | FoodData Central #174276 |
A typical 1 oz serving of soy protein isolate contains 24.7 grams of protein (88.3 g per 100 g), which makes it a very good source of protein. That covers roughly 49% of the 50 g reference Daily Value, so it can anchor a high-protein meal for the day.
About 105% of the calories in soy 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, soy protein isolate ranks 2nd by protein per serving, and 49th out of all 796 foods on the site. Set against soy protein concentrate, another protein supplement entry in the database, a serving carries about 6.9 g more protein (soy protein concentrate has 17.8 g per 1 oz).
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 measured by weight at 28 g. The per-100 g figure lets you compare it directly against any other food here, whatever its serving.
One of the few plant foods that is a complete protein, with all nine essential amino acids.
Source: USDA FoodData Central #174276 - "Soy protein 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
Soy protein isolate has 88.3 g of protein per 100 g. A typical 1 oz serving (28 g) provides 24.7 g.
Yes. Soy 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 oz serving of soy protein isolate contains 24.7 g of protein, about 49% of the 50 g reference Daily Value.
Soy protein isolate is a very good source of protein, and about 105% of its calories come from protein, which makes it extremely protein-dense. Set against soy protein concentrate, another protein supplement entry in the database, a serving carries about 6.9 g more protein (soy protein concentrate has 17.8 g per 1 oz).
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