Protein content
A 1 cup cooked serving of soybeans (mature) contains 31.3 g of protein - an excellent source of protein, about 63% of the 50 g Daily Value.
Share of this food's calories that come from protein - it is very protein-dense.
| Serving | 1 cup cooked (172 g) |
|---|---|
| Protein per serving | 31.3 g |
| Protein per 100 g | 18.2 g |
| Calories per serving | 296 kcal |
| Protein density | 42% of calories |
| Share of 50 g Daily Value | 63% |
| Protein quality | Complete protein |
| Category | Soy foods |
| Food type | Whole food |
| USDA record | FoodData Central #174299 |
A typical 1 cup cooked serving of soybeans (mature) contains 31.3 grams of protein (18.2 g per 100 g), which makes it an excellent source of protein. That covers roughly 63% of the 50 g reference Daily Value, so it can anchor a high-protein meal for the day.
Protein accounts for roughly 42% of the calories in soybeans (mature), making it very protein-dense. The rest comes from fat and carbohydrate, so it adds a solid amount of protein while still carrying real energy - useful when you are eating to a calorie target rather than under one.
Among the 31 soy foods in the database, soybeans (mature) ranks 1st by protein per serving, and 6th out of all 796 foods on the site. Set against veggie burger, another soy food entry in the database, a serving carries about 15.6 g more protein (veggie burger has 15.7 g per 1 patty).
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 volume at 172 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 #174299 - "Soybeans, mature seeds, cooked, boiled, with salt" (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
Soybeans (mature) has 18.2 g of protein per 100 g. A typical 1 cup cooked serving (172 g) provides 31.3 g.
Yes. Soybeans (mature) 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 cup cooked serving of soybeans (mature) contains 31.3 g of protein, about 63% of the 50 g reference Daily Value.
Soybeans (mature) is an excellent source of protein, and about 42% of its calories come from protein, which makes it very protein-dense. Set against veggie burger, another soy food entry in the database, a serving carries about 15.6 g more protein (veggie burger has 15.7 g per 1 patty).
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