Hydrolyzed Soy Flour
Reviewed by Daisy · Last updated 18 Aug 2026
Also known as: Skin Conditioning Ingredients, Soy Extract, Soy Isoflavones, Hydrolyzed Soy Protein, Glycine Soja Sterols, Glycine Soja Oil, Glycine Soja Seed Extract, Glycine Soja (Soybean) Seed Extract
Derived from soybeans | Used as a skin conditioning ingredient
Addresses
EWG Safety Score
What Is Hydrolyzed Soy Flour?
Hydrolyzed soy flour is an ingredient derived from soybeans (Glycine soja beans). The beans are ground into flour, which is then subjected to a chemical process called hydrolysis in which water, enzymes, or acids are used to break down the flour into different components.
Hydrolyzed soy flour is mainly used in cosmetics as a hair and skin conditioning ingredient, though it also has skin calming properties and antioxidant benefits.
Though not as frequently used as the related soy protein, it is considered safe as used in cosmetics, where it’s use level typically ranges from 1–5%.
Clinical Evidence & References
Published Research
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CoSmile Europe, Website, Accessed July 2025 [URL not provided]
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European Commission, Website, Accessed July 2025 [URL not provided]
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Food Chemistry, October 2012, pages 2,217-2,225 [URL not provided]
Frequently Asked Questions
From the Clinic
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