PEG-20 SOY STEROL

What Is PEG-20 SOY STEROL?

A polyethylene glycol ether of soybean-derived phytosterols, produced by ethoxylating soy sterols with 20 moles of ethylene oxide. Soy sterols (primarily beta-sitosterol, campesterol, and stigmasterol) are plant-based cholesterol analogs that support skin barrier function. PEG Soy Sterols combine the skin-identical benefits of phytosterols with the emulsifying power of PEG chains.

Key Skin Benefits

• + Barrier support — phytosterols mimic skin cholesterol, aiding barrier repair
• + Emulsification — PEG chains provide surfactant/emulsifier function
• + Anti-inflammatory — phytosterols have calming properties on skin
• + Emollient — contributes to a smooth, non-greasy skin feel

Pros

• + Phytosterols support skin barrier function — cholesterol-like structure
• + Dual-action: emulsifier with skin-beneficial sterol backbone
• + Partially plant-derived from non-GMO soybean sterols
• + Good alternative to lanolin-based sterol emulsifiers
• + Anti-inflammatory and soothing properties

Cons

• − Ethoxylation introduces 1,4-dioxane/ethylene oxide trace concerns
• − Not natural — chemically modified despite plant origin
• − More expensive than standard PEG emulsifiers
• − Soy origin may raise concerns for soy-allergic individuals (though proteins removed)

Specifications

Safety Ratings

Regional Regulatory Limits

Typical Usage % by Product Type

References

1. CIR (2013) — Safety Assessment of Phytosterols as Used in Cosmetics. https://www.cir-safety.org/
2. CosIng (2025) — European Commission Cosmetic Ingredient Database. https://ec.europa.eu/growth/tools-databases/cosing/
3. EWG Skin Deep — PEG compound safety database. https://www.ewg.org/skindeep/