A typical 1 cup cooked serving of soybean sprouts contains 8 grams of protein (8.47 g per 100 g), which makes it a good source of protein. That covers roughly 16% of the 50 g reference Daily Value, so it adds toward your protein total for the day.
Protein accounts for roughly 42% of the calories in soybean sprouts, 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, soybean sprouts ranks 15th by protein per serving, and 351st out of all 796 foods on the site. Set against meatless deli slices, another soy food entry in the database, a serving carries about 3 g more protein (meatless deli slices has 5 g per 1 slice).
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 94 g. The per-100 g figure lets you compare it directly against any other food here, whatever its serving.
Source: USDA FoodData Central #168460 - "Soybeans, mature seeds, sprouted, cooked, steamed" (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
Soybean sprouts protein FAQ
How much protein is in soybean sprouts per 100 g?
Soybean sprouts has 8.47 g of protein per 100 g. A typical 1 cup cooked serving (94 g) provides 8 g.
Is soybean sprouts a complete protein?
Yes. Soybean sprouts 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.
How much of the Daily Value does a serving of soybean sprouts cover?
A 1 cup cooked serving of soybean sprouts contains 8 g of protein, about 16% of the 50 g reference Daily Value.
Is soybean sprouts a good source of protein?
Soybean sprouts is a good source of protein, and about 42% of its calories come from protein, which makes it very protein-dense. Set against meatless deli slices, another soy food entry in the database, a serving carries about 3 g more protein (meatless deli slices has 5 g per 1 slice).