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HYDROXYPROPYLTRIMONIUM HYDROLYZED SOY PROTEIN.

Valuable CAS 156715-44-5 / ANTISTATIC, HAIR CONDITIONING, SKIN CONDITIONING

A cationized derivative of hydrolyzed soy protein, this ingredient delivers short-chain peptides and amino acids that mimic the skin's Natural Moisturizing Factors (NMF). It functions as a powerful humectant, enhancing skin hydration and contributing to a resilient skin barrier.

Summary

Humectant Moisturizing Skin Barrier Support Antioxidant Conditioning (Skin) Elasticity Enhancer

Science

Mechanism of Action

Hydroxypropyltrimonium Hydrolyzed Soy Protein operates by attracting and retaining water, acting as a humectant to significantly boost skin moisture content, resulting in a softer, smoother complexion. Its soy-derived peptides fortify the stratum corneum, effectively diminishing transepidermal water loss (TEWL) and bolstering barrier function. Additionally, these peptides and isoflavones provide antioxidant protection against environmental stressors, while small molecules are believed to aid tissue repair and potentially stimulate collagen and elastin synthesis for improved skin firmness and elasticity.

Research

Clinical Evidence

Medium confidence
Effective range 1–5%
Optimal

N/A

Key findings

  1. 01 Typical use levels between 1-5% have been observed for its skin moisturizing benefits.

Transparency

Dusting Analysis

Not commonly dusted

The Formula

Formulation

Solubility
Water
Optimal pH N/A
0 7 14

Stability

This ingredient is highly soluble in water, ensuring quick and even dispersion when incorporated into the water phase of emulsions. It is advisable to avoid processing temperatures exceeding 40 degrees Celsius. While a precise optimal pH range for its stability in cosmetic formulations is not explicitly defined, broad pH stability is generally reported for products containing hydrolyzed soy protein.

Safety

Safety Profile

CIR Status
Safe as used
Max tested
3.5%
Sensitization risk Low

The Cosmetic Ingredient Review (CIR) Expert Panel has affirmed the safety of soy proteins and peptides, including this ingredient, in cosmetic applications at current use levels. Studies demonstrated no dermal sensitization at concentrations up to 25% and only mild to no irritation in ocular assays at concentrations up to 35%. The highest reported maximum concentration in a cosmetic product is 3.5% in mascara.

Your Skin

Skin Compatibility

Yes Normal
Yes Dry
Yes Oily
Yes Sensitive
Irritancy Low
Comedogenicity Unknown

Our Assessment

Verdict

Valuable

HYDROXYPROPYLTRIMONIUM HYDROLYZED SOY PROTEIN is a valuable ingredient, offering robust hydration, superior barrier support, and antioxidant benefits, suitable for all skin types and a wide range of cosmetic applications.

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