USDA reference food · Legumes and Legume Products

Soy protein isolate, potassium type

Per 100 g, soy protein isolate, potassium type has 320 calories, 88g of protein, 0.5g of fat and 0g of fiber (USDA FoodData Central, SR Legacy, FDC 174302). It is one of 2 USDA descriptions of soy protein isolate.

FoodData Central 174302, SR Legacy, in the April 30, 2026 release; USDA record.

Nutrition Facts

Serving size100 g (100g)

AmountPortion

Amount per serving

Calories320

% Daily Value*

Total Fat 0.5g1%

Saturated Fat 0g0%

Trans Fat 0g

Cholesterol 0mg0%

Sodium 50mg2%

Total Carbohydrate 3g1%

Dietary Fiber 0g0%

Total Sugars 0g

Includes Added Sugars not declared

Protein 88g177%

Vitamin D 0mcg0%

Calcium 180mg14%

Iron 15mg81%

Potassium 1590mg34%

* The % Daily Value (DV) tells you how much a nutrient in a serving of food contributes to a daily diet. 2,000 calories a day is used for general nutrition advice. Protein % DV here is not corrected for protein quality.

USDA values per 100 g (SR Legacy), scaled to the portion. Check the USDA record.

Protein per 100 g: 88.3g; more than 100% of 8,218 USDA reference foods
Calories per 100 g: 321; more than 75% of reference foods
Fiber per 100 g: 0g; more than 0% of reference foods

What a portion gives you

Fiber 0g0%

Protein 88g177%

Potassium 1590mg34%

Calcium 180mg14%

Iron 15mg81%

Sodium 50mg2%

Ticks: 5% of the Daily Value (FDA: low) and 20% (high)

Source: USDA FoodData Central, SR Legacy (FDC 174302); FDA Daily Values, 21 CFR 101.9.

Also rich in

Copper1.6 mg in 100 g (100 g), 178% of the Daily Value
Manganese1.5 mg in 100 g (100 g), 65% of the Daily Value
Phosphorus776 mg in 100 g (100 g), 62% of the Daily Value
Folate176 µg DFE in 100 g (100 g), 44% of the Daily Value
Zinc4.0 mg in 100 g (100 g), 37% of the Daily Value
Choline191 mg in 100 g (100 g), 35% of the Daily Value
Thiamin0.2 mg in 100 g (100 g), 15% of the Daily Value

Source: USDA FoodData Central (FDC 174302), every nutrient the record reports; FDA Daily Values, 21 CFR 101.9.

Where the calories come from: 3% carbohydrate, 1% fat and 96% protein (4 calories a gram of protein or carbohydrate, 9 of fat).

Where it sits among USDA reference foods

Per 100 g	This food	Share with less
Calories	321	75%
Protein	88.3 g	100%
Total fat	0.53 g	22%
Carbohydrate	2.59 g	37%
Fiber	0 g	0%
Total sugars	0 g	0%
Sodium	50.0 mg	33%

Source: USDA FoodData Central, SR Legacy and Foundation Foods: the 6,012 to 8,218 reference foods that report each value; the share of them with less per 100 g.

Every nutrient in this record (87)

The portion is 100 g (100 g); % DV is for that portion.

Energy, macronutrients and sugars (14)

Nutrient	Per portion	Per 100 g	% DV
Protein	88.3 g	88.3 g	177%
Total lipid (fat)	0.53 g	0.53 g	1%
Carbohydrate, by difference	2.59 g	2.59 g	1%
Ash	3.58 g	3.58 g
Energy	321 kcal	321 kcal
Alcohol, ethyl	0 g	0 g
Water	4.98 g	4.98 g
Total Sugars	0 g	0 g
Fiber, total dietary	0 g	0 g	0%
Cholesterol	0 mg	0 mg	0%
Fatty acids, total trans	0 g	0 g
Fatty acids, total saturated	0.077 g	0.077 g	0%
Fatty acids, total monounsaturated	0.12 g	0.12 g
Fatty acids, total polyunsaturated	0.30 g	0.30 g

Minerals (10)

Nutrient	Per portion	Per 100 g	% DV
Calcium, Ca	178 mg	178 mg	14%
Iron, Fe	14.5 mg	14.5 mg	81%
Magnesium, Mg	39.0 mg	39.0 mg	9%
Phosphorus, P	776 mg	776 mg	62%
Potassium, K	1,590 mg	1,590 mg	34%
Sodium, Na	50.0 mg	50.0 mg	2%
Zinc, Zn	4.03 mg	4.03 mg	37%
Copper, Cu	1.60 mg	1.60 mg	178%
Manganese, Mn	1.49 mg	1.49 mg	65%
Selenium, Se	0.80 µg	0.80 µg	1%

Vitamins (24)

Nutrient	Per portion	Per 100 g	% DV
Retinol	0 µg	0 µg
Vitamin A, RAE	0 µg	0 µg	0%
Carotene, beta	0 µg	0 µg
Carotene, alpha	0 µg	0 µg
Vitamin E (alpha-tocopherol)	0 mg	0 mg	0%
Vitamin D (D2 + D3)	0 µg	0 µg	0%
Cryptoxanthin, beta	0 µg	0 µg
Lycopene	0 µg	0 µg
Lutein + zeaxanthin	0 µg	0 µg
Vitamin C, total ascorbic acid	0 mg	0 mg	0%
Thiamin	0.18 mg	0.18 mg	15%
Riboflavin	0.10 mg	0.10 mg	8%
Niacin	1.44 mg	1.44 mg	9%
Pantothenic acid	0.060 mg	0.060 mg
Vitamin B-6	0.10 mg	0.10 mg	6%
Folate, total	176 µg	176 µg
Vitamin B-12	0 µg	0 µg	0%
Choline, total	191 mg	191 mg	35%
Vitamin K (phylloquinone)	0 µg	0 µg	0%
Folic acid	0 µg	0 µg
Folate, food	176 µg	176 µg
Folate, DFE	176 µg	176 µg	44%
Vitamin E, added	0 mg	0 mg
Vitamin B-12, added	0 µg	0 µg

Amino acids (18)

Nutrient	Per portion	Per 100 g
Tryptophan	1.12 g	1.12 g
Threonine	3.14 g	3.14 g
Isoleucine	4.25 g	4.25 g
Leucine	6.78 g	6.78 g
Lysine	5.33 g	5.33 g
Methionine	1.13 g	1.13 g
Cystine	1.05 g	1.05 g
Phenylalanine	4.59 g	4.59 g
Tyrosine	3.22 g	3.22 g
Valine	4.10 g	4.10 g
Arginine	6.67 g	6.67 g
Histidine	2.30 g	2.30 g
Alanine	3.59 g	3.59 g
Aspartic acid	10.2 g	10.2 g
Glutamic acid	17.5 g	17.5 g
Glycine	3.60 g	3.60 g
Proline	4.96 g	4.96 g
Serine	4.59 g	4.59 g

Fatty acids (19)

Nutrient	Per portion	Per 100 g
SFA 4:0	0 g	0 g
SFA 6:0	0 g	0 g
SFA 8:0	0 g	0 g
SFA 10:0	0 g	0 g
SFA 12:0	0 g	0 g
SFA 14:0	0.0010 g	0.0010 g
SFA 16:0	0.056 g	0.056 g
SFA 18:0	0.019 g	0.019 g
MUFA 18:1	0.12 g	0.12 g
PUFA 18:2	0.26 g	0.26 g
PUFA 18:3	0.035 g	0.035 g
PUFA 20:4	0 g	0 g
PUFA 22:6 n-3 (DHA)	0 g	0 g
MUFA 16:1	0.0010 g	0.0010 g
PUFA 18:4	0 g	0 g
MUFA 20:1	0 g	0 g
PUFA 20:5 n-3 (EPA)	0 g	0 g
MUFA 22:1	0 g	0 g
PUFA 22:5 n-3 (DPA)	0 g	0 g

Source: USDA FoodData Central, FDC 174302: every value the record reports, per 100 g as USDA gives it and scaled to the portion; Daily Values: 21 CFR 101.9.

Other ways to eat soy protein isolate

USDA lists 2 preparations of soy protein isolate. The soy protein isolate page puts them side by side, per 100 g and per portion.

Compare every soy protein isolate preparation

Next questions

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Sources for this page

USDA FoodData Central: this record and every record it is compared with, April 30, 2026 release. fdc.nal.usda.gov
FoodData Central documentation: what branded, SR Legacy, Foundation and survey records are. fdc.nal.usda.gov
USDA Food and Nutrient Database for Dietary Studies: survey foods and their household portions. ars.usda.gov
21 CFR 101.9, Nutrition labeling of food: the label format, its rounding and the Daily Values. ecfr.gov
21 CFR 101 subpart D, Nutrient content claims: the FDA thresholds the comparisons count. ecfr.gov
FDA, How to Understand and Use the Nutrition Facts Label: the 5% and 20% Daily Value rule. fda.gov