Every 100 kcal of soy protein powder brings 14.3 g of protein. On that measure it ranks 7th of the 11 protein supplements in this database and 155th of all 796 foods on the site. Measured by weight instead, its 55.6 g per 100 g ranks 7th in its group.
About 57% of the calories in soy protein powder come from protein, which makes it very 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.
Weight for weight, soy protein powder has 10 g of protein for each gram of fat (55.6 g against 5.56 g per 100 g).
Set against egg white protein powder, another protein supplement entry in the database, a serving carries about 2.3 g more protein (egg white protein powder has 22.7 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 quoted here is counted by piece at 45 g, and it covers about 50% of the 50 g FDA Daily Value for protein.
One of the few plant protein powders that is a complete protein on its own.
Serving sizes
Protein in common portions of soy protein powder
Protein and calories in Soy protein powder for 100 g, the site serving and USDA household portions.
Portion
Weight
Protein
Calories
100 g
100 g
55.6 g
388 kcal
1 scoop (serving used here)
45 g
25 g
175 kcal
The USDA record lists no other household measure for this food; protein and calories scale from the per-100 g figures.
Amino acids
Essential amino acids in soy protein powder
The nine essential amino acids in Soy protein powder, per 100 g, per serving and per gram of protein.
Amino acid
Per 100 g
Per serving
mg per g protein
leucine
4.6 g
2.07 g
83
lysine
3.55 g
1.6 g
64
valine
2.83 g
1.27 g
51
isoleucine
2.76 g
1.24 g
50
threonine
2.17 g
0.98 g
39
phenylalanine
2.96 g
1.33 g
53
methionine
0.722 g
0.32 g
13
histidine
1.51 g
0.68 g
27
tryptophan
0.722 g
0.32 g
13
Per-100 g values are the amino acid analysis on the USDA record. The serving and per-gram-of-protein columns are arithmetic on those values; they are not a protein quality score.
SampleWhat goal trends look like after a week
109 g
Average per logged day
4 of 7
Days goal met
71%
Complete-protein share
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Sample figures for one made-up week against a 110 g goal, not your data. Red bars met the goal. Your own log fills this in with Premium.
How much protein is in 100 g of soy protein powder?
55.6 g. The 1 scoop serving used on this page weighs 45 g and so carries 25 g.
How much protein do you get per 100 calories of soy protein powder?
14.3 g. That figure divides its 55.6 g of protein per 100 g by its 388 kcal per 100 g, so it does not depend on serving size.
Is the protein in soy protein powder complete?
Yes. The protein in soy protein powder supplies all nine essential amino acids in adequate amounts, so it can carry a meal's protein on its own.
What share of the protein Daily Value is one serving of soy protein powder?
About 50%. One 1 scoop serving has 25 g, and the FDA Daily Value for protein is 50 g.
Figures from USDA FoodData Central record #173181 (Beverages, Protein powder soy based), SR Legacy data. USDA data is in the public domain. Values are the published reference figures for that record, not lab measurements for a specific brand or batch.