A typical 1/4 cup serving of soy flour (full-fat) contains 7.9 grams of protein (37.8 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 35% of the calories in soy flour (full-fat), 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, soy flour (full-fat) ranks 16th by protein per serving, and 354th out of all 796 foods on the site. Set against meatless deli slices, another soy food entry in the database, a serving carries about 2.9 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 21 g. The per-100 g figure lets you compare it directly against any other food here, whatever its serving.
Source: USDA FoodData Central #174273 - "Soy flour, full-fat, raw" (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 flour (full-fat) protein FAQ
How much protein is in soy flour (full-fat) per 100 g?
Soy flour (full-fat) has 37.8 g of protein per 100 g. A typical 1/4 cup serving (21 g) provides 7.9 g.
Is soy flour (full-fat) a complete protein?
Yes. Soy flour (full-fat) 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 soy flour (full-fat) cover?
A 1/4 cup serving of soy flour (full-fat) contains 7.9 g of protein, about 16% of the 50 g reference Daily Value.
Is soy flour (full-fat) a good source of protein?
Soy flour (full-fat) is a good source of protein, and about 35% 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 2.9 g more protein (meatless deli slices has 5 g per 1 slice).