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Moumoujus

PEG-5 PHYTOSTEROL.

Valuable / SURFACTANT - EMULSIFYING

PEG-5 Phytosterol is a polyoxyethylenated phytosterol, functioning primarily as a co-emulsifier and surfactant in skincare formulations. It effectively stabilizes oil-in-water emulsions while delivering notable hydrating and skin-conditioning benefits.

Summary

Emulsifying Agent Surfactant/Cleansing Agent Skin-Conditioning Agent Emollient Viscosity Controlling Agent Hydrator Photoprotective Agent Barrier Support

Science

Mechanism of Action

This ingredient acts as an ether-type nonionic surfactant and co-emulsifier, precisely bridging oil and water phases to create more stable cosmetic emulsions. As a PEG derivative, it significantly contributes to skin hydration by forming hydrogen bonds that retain moisture and reduce transepidermal water loss, thereby supporting the skin's natural barrier. The phytosterol component further conditions the skin, promoting collagen and elastin secretion, aiding in wound healing, and offering both moisturizing and photoprotective properties.

Research

Clinical Evidence

High confidence
Effective range 0.75–2%
Optimal

N/A

Key findings

  1. 01 Clinical investigations at concentrations up to 2% demonstrated no dermal or ocular irritation, dermal sensitization, or photosensitization.
  2. 02 A formulation containing 0.75% PEG-5 Phytosterol (alongside 1.5% PEG-25 Soy Sterol) showed no increase in comedones, irritation, or allergic reactions.

Transparency

Dusting Analysis

Not commonly dusted

The Formula

Formulation

Solubility
Both
Optimal pH N/A
0 7 14

Stability

Phytosterols generally exhibit robust stability across a broad spectrum of pH values in cosmetic product formulations.

Conflicts

  • It is strongly advised against using this ingredient in cosmetic products intended for application on damaged skin, due to documented concerns regarding potential systemic toxicity and sensitization associated with PEGs under such conditions.

Safety

Safety Profile

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

The Cosmetic Ingredient Review (CIR) Expert Panel has affirmed the safety of PEG Soy Sterols, including PEG-5 Phytosterol, for use in cosmetic products. Manufacturers are responsible for employing stringent purification procedures to ensure the removal of potential impurities, such as 1,4-dioxane and unreacted ethylene oxide residues.

Your Skin

Skin Compatibility

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

Our Assessment

Verdict

Valuable

PEG-5 Phytosterol is a valuable multi-functional ingredient that enhances formulation stability while offering proven hydrating, conditioning, and barrier-supporting benefits, making it suitable for a wide range of skin types.

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