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Moumoujus

PEG-25 SOY STEROL.

Valuable / SURFACTANT - EMULSIFYING

PEG-25 Soy Sterol is a multi-functional ingredient derived from soy, primarily serving as an emulsifying agent to stabilize cosmetic formulations. It also acts as a potent skin conditioning agent, enhancing hydration and restoring suppleness to the skin.

Summary

Emulsifying Skin Conditioning Surfactant Hydrating Moisture Retention Barrier Support Soothing Anti-aging Antioxidant

Science

Mechanism of Action

This ingredient functions as a surfactant, effectively reducing surface tension at oil-water interfaces to facilitate the creation and stability of emulsions. As a skin conditioning agent, it improves the appearance of dry or compromised skin by minimizing flaking and restoring softness. The inherent soy sterol component provides additional benefits, including deep hydration, moisture retention, enhanced skin barrier function, soothing effects, anti-aging properties, and protection against oxidative damage.

Research

Clinical Evidence

High confidence
Effective range 1.5–2%
Optimal

1.5-2.0%

Key findings

  1. 01 Clinical evaluations demonstrated that PEG-25 Soy Sterol, when incorporated at a 1.5% concentration in a liquid makeup foundation, did not contribute to an increase in comedones, nor did it elicit signs of irritation or allergic reactions.
  2. 02 Studies on the structurally related PEG-5 Soy Sterol confirmed an absence of dermal irritation, ocular irritation, dermal sensitization, or photosensitization when utilized in formulations at concentrations up to 2%.

Transparency

Dusting Analysis

Not commonly dusted

Information regarding specific 'dusting' concerns for PEG-25 Soy Sterol is not available in the provided research data.

The Formula

Formulation

Solubility
Water
Optimal pH 5 – 7
0 7 14

Stability

Maintains optimal stability within a pH range of 5.0 to 7.0, a characteristic consistent with related soy sterol compounds observed in 1% aqueous dispersions.

Conflicts

  • Not recommended for application on compromised or damaged skin due to potential kidney-related effects historically associated with PEGs on burned skin.

Safety

Safety Profile

CIR Status
Safe as used
Max tested
2%
Sensitization risk Low

The Cosmetic Ingredient Review (CIR) Expert Panel has concluded that PEG-25 Soy Sterol and its related compounds are safe for use in cosmetic and personal care products, with a recommended maximum concentration of 2%. However, its use on damaged skin is advised against due to potential systemic effects of PEGs. Formulations must undergo purification to mitigate the presence of 1,4-dioxane, a potential by-product of its ethoxylation process. The FDA has acknowledged its safety for specific, limited use in food applications.

Your Skin

Skin Compatibility

Yes Normal
Yes Dry
No Oily
Yes Sensitive
Irritancy Low
Comedogenicity Low

Our Assessment

Verdict

Valuable

PEG-25 Soy Sterol is a valuable ingredient, effectively stabilizing emulsions while offering significant skin conditioning, hydration, and soothing benefits across various skin types, with a strong safety profile up to 2% concentration.

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