Soy Protein Isolate
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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.