PEG-30 Soy Sterol
molecular structure · PubChem
AKA: Soy Sterol Ethoxylate, Phytosterol PEG
Allergen Warning
⚠️ Soy
Synthetic
Cleanser
Emulsifier
Not Clean
PEG-30 Soy Sterol is a polyethylene glycol derivative of sterols obtained from Glycine Soja (Soybean) Oil with an average of 30 moles of ethylene oxide
Functions
Cleansing
Makes oil and water mix so dirt, makeup, and sunscreen can actually be washed away. The reason your face wash foams.
Emulsifying
Forces oil and water to stay mixed instead of separating into layers. The unsung hero holding your lotion together.
Cleansing Surfactant
Emulsifier
Antioxidant Protection
Locks In Moisture
Reduces Inflammation
Removes Impurities
Mixes Oil & Water
Traditional Use
Soy sterols, plant-derived compounds from soybeans, have been studied for their skin-conditioning benefits; this PEG-modified version was developed in the late 20th century to improve solubility and stability in cosmetic formulations.
EWG
4
CIR
Safe as used
Pregnancy
Yes
CIR Safety Findings
medical-approval
all-shades-safe
Regulatory Agencies
Skin Types
●all-skin-types
Best For
Dryness
Pregnancy & Breastfeeding Safe
Yes
The paper trail
🔬Peer-reviewednone on file
⚖️Regulatory1 listing →
🛡️Safety-assessed2 reviews →
Counts, not a verdict. A listing isn't a study. The trail, you decide.
Verified Jun 2026
Data: CosIng · EWG · CIR