Science
Mechanism of Action
This ingredient functions primarily by supplying short-chain peptides and amino acids that mimic the skin's Natural Moisturizing Factors (NMF), effectively replenishing moisture and creating a hydrating network on the skin surface. It strengthens the skin barrier through interaction with keratin, which enhances the skin matrix and helps minimize transepidermal water loss (TEWL). Additionally, some research suggests it may contribute to increased collagen and elastin synthesis, supporting skin elasticity. Its naturally occurring isoflavones and peptides offer antioxidant protection, bolstering the skin's defense against environmental stressors. As a surfactant, it also exhibits gentle cleansing properties for both skin and hair.
Research
Clinical Evidence
Low confidenceN/A
Transparency
Dusting Analysis
The Formula
Formulation
Stability
The ingredient is stable under recommended storage but is sensitive to extreme pH levels and temperatures. While its optimal solubility for the hydrolyzed soy protein component is at pH 2.0 and 9.0, with reduced solubility between pH 4.0 and 5.0, optimal formulation pH is generally within the 5.0-9.0 range.
Conflicts
- cationic surfactants
- strong oxidizing agents
Safety
Safety Profile
The Cosmetic Ingredient Review (CIR) Expert Panel has deemed soy proteins and peptides, including Hydrolyzed Soy Protein, safe for cosmetic use within current industry practices and concentrations. It is important to note that the FDA's assessment regarding the safety and effectiveness of soybean protein pertains to weight control drugs, not cosmetic applications.
Your Skin
Skin Compatibility
Our Assessment
Verdict
This multi-functional ingredient is valuable for its ability to provide hydration, reinforce the skin barrier, offer antioxidant protection, and gently cleanse across all skin types.
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References
Sources