Hydrolyzed Soymilk Protein
AKA “Soy Protein, Hydrolyzed Soy Protein”
Synthetic
Ingredient Facts
Hydrolyzed soymilk protein
AKA: Soy Protein, Hydrolyzed Soy Protein
Synthetic · Humectant · EWG: 4
Plant-Derived Synthetic
Humectant
Occlusive
Skin Conditioner
Synthetic
Clean
Soymilk protein that softens and conditions skin, helping it feel smooth and hydrated. Contains soy, so skip if you have a soy allergy.
Form
Powder
See origin →
Functions
Skin Conditioning
A catch-all term for ingredients that improve how skin looks and feels — softer, smoother, more supple. The workhorse behind most moisturizers.
Humectant
A moisture magnet. Pulls water from the air and deeper skin layers up to the surface to keep skin plump and hydrated.
Film Forming
Creates a physical seal on skin to lock moisture in and keep irritants out. The "slugging" ingredient — barrier protection.
Locks in moisture
Traditional Use
Soymilk has been used in East Asian beauty traditions for centuries as a gentle cleanser and moisturizer. The hydrolyzed protein form is a modern adaptation designed to concentrate soy's amino acids and peptides for improved skin conditioning.
Skin Types
●all-skin-types
Best For
Dryness
Melanin-Rich Skin
Suitable
Pregnancy & Breastfeeding Safe
Yes
Final Report: Safety Assessment of Soy Proteins and Peptides as Used in Cosmetics
Cosmetic Ingredient Review (CIR) Expert Panel
International Journal of Toxicology
Hydrolyzed Soy Protein
European Commission
EU Cosmetic Ingredient Database (CosIng)
Hydrolyzed Soy Protein Extract
European Commission
EU Cosmetic Ingredient Database (CosIng)
Hydrolyzed Soymilk Protein
European Commission
EU Cosmetic Ingredient Database (CosIng)
Hydrolyzed Soymilk Protein
Environmental Working Group (EWG)
EWG Skin Deep Cosmetics Database
Assessment of IgE binding to native and hydrolyzed soy protein in serum obtained from dogs with experimentally induced soy protein hypersensitivity.
Serra M, Brazís P, Fondati A, Puigdemont A
American journal of veterinary research, 2006
Verified Feb 2026
Data: CosIng · EWG · CIR