Ingredient

Soy Protein Isolate

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Source
Not animal-derived
Allergen
No
Role in food
Manufacturers add soy protein isolate to foods primarily to boost their protein content. It …

What it is

Soy protein isolate is a highly refined form of protein made from soybeans. It is produced by removing most of the fats and carbohydrates from defatted soybean flakes, resulting in a product that is at least 90% protein.

Why it's used

Manufacturers add soy protein isolate to foods primarily to boost their protein content. It is often found in protein bars, breakfast cereals, meat alternatives, and nutritional shakes, where it can also help improve texture.

Health notes

Soy protein isolate is generally recognized as safe (GRAS) by the U.S. Food and Drug Administration (FDA). JECFA has evaluated soy protein products, and EFSA has also assessed soy protein. While some discussions exist regarding phytoestrogens in soy, current scientific evidence generally supports its safety at typical consumption levels for healthy individuals.

Allergen info

Soy is one of the nine major food allergens identified by the FDA.

Products containing Soy Protein Isolate

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Kellogg Company US Gardenburger Gb Veggie Burgers Black Bean 3Oz 48Ct Vegetable Based Products / Meals - Not Ready to Eat (Frozen) High in sodium — 28% DV per serving 112kcal 10.8Protein 3Fat 16.9Carbs Kashi US Bear Naked Bars Chocolate 7.05Oz Cereal/Muesli Bars —kcal 11.1Protein 24.8Fat 55.3Carbs Kashi US Bear Naked Bars Fruit & Nut 1.41Oz Cereal/Muesli Bars —kcal 8Protein 17.1Fat 64Carbs Kellogg Company US Morningstar Farms Poultry Chik Patties Original 37.5Oz Vegetable Based Products / Meals - Not Ready to Eat (Frozen) —kcal 12.8Protein 9Fat 26.2Carbs Kellogg Company US Kellogg Special K Hot Cereal Cinnamon Raisin 1.83Oz Cereals Products - Not Ready to Eat (Shelf Stable) —kcal 14.1Protein 10.4Fat 61.9Carbs Kellogg Company US Kellogg Special K Hot Cereal Maple Brown Sugar 3.66Oz Cereals Products - Not Ready to Eat (Shelf Stable) —kcal 15.4Protein 9.9Fat 62.1Carbs Kellogg Company US Kellogg Special K Hot Cereal Cinnamon Raisin Pecan 3.66Oz Cereals Products - Not Ready to Eat (Shelf Stable) —kcal 14.1Protein 10.4Fat 61.9Carbs Kellogg Company US Morningstar Farms Veggie Burgers Grillers California Turk'Y 9Oz Vegetable Based Products / Meals - Not Ready to Eat (Frozen) —kcal 14.9Protein 7.7Fat 12.6Carbs Kellogg Company US Kellogg Special K Protein Bars Cranberry Walnut 1.59Oz Cereal/Muesli Bars —kcal 22.5Protein 11Fat 53Carbs Kellogg Company US Kellogg Special K Hot Cereal Honey Nut 3.66Oz Cereals Products - Not Ready to Eat (Shelf Stable) —kcal 14.6Protein 7.8Fat 67.4Carbs Kellogg Company US Kellogg Special K Hot Cereal Honey Nut Crunch 1.83Oz Cereals Products - Not Ready to Eat (Shelf Stable) —kcal 14.6Protein 7.8Fat 67.4Carbs Kellogg Company US Kellogg Special K Protein Bars Chocolatey Dipped Mint 15.9Oz Cereal/Muesli Bars High in saturated fat — 22% DV per serving —kcal 18.8Protein 13.3Fat 54.9Carbs

Last updated: September 28, 2026

Note: This site presents label data from USDA FoodData Central for general information. It is not medical advice. Check the package label; formulations change.