Ingredient review
PEG-10 Rapeseed Sterol
INCI: PEG-10 RAPESEED STEROL
A mild, plant-derived emulsifier that helps blend oil and water in skincare formulas while adding a smooth, non-greasy feel.
In plain English
PEG-10 Rapeseed Sterol is a semi-synthetic ingredient made by attaching a small chain of ethylene glycol (PEG) to a sterol molecule from rapeseed oil. In skincare, it acts as an emulsifier—meaning it helps oil and water mix together so your lotion or cream stays smooth and doesn't separate. It also has mild skin-conditioning properties, leaving skin feeling soft without a heavy residue. Because it's derived from a plant source and has a low irritation profile, it's often used in gentle formulations.
Review score
Safety, usefulness, and evidence
Potentially useful with some tradeoffs
The evidence base is useful, but some claims depend heavily on the formula.
Risk flags are low for most users, though the finished product can still irritate.
- Source
- semi synthetic
- Evidence
- moderate
- Irritation
- low
- Clogging risk
- low
Quick decision guide
Useful, but context matters
PEG-10 Rapeseed Sterol is generally a lower-concern ingredient when the full formula suits your skin.
Plain-English read
Treat this as a practical screening step before you compare products that contain this ingredient.
- Step 1Start with the score, then check the irritation and clogging risk before judging PEG-10 Rapeseed Sterol.
- Step 2Use the "Best for" and "Use caution if" sections to match the ingredient to your skin, not just to a marketing claim.
- Step 3If a product stings, breaks you out, or worsens irritation, judge the finished formula and stop using it even if the ingredient scores well.
Score terms in plain English
Irritation risk
lowLess likely to sting, burn, or bother most users, though sensitive skin can still react.
Clogging risk
lowLess likely to feel heavy or contribute to clogged pores for most skin types.
Evidence level
moderateThere is useful support, but formula details and claim strength still matter.
What it is
A semi-synthetic emulsifier created by reacting rapeseed sterol (a plant-based compound) with 10 units of polyethylene glycol (PEG). This process makes the sterol water-compatible, allowing it to stabilize oil-in-water emulsions.
How it works
The PEG chain makes the sterol molecule water-loving (hydrophilic), while the sterol part remains oil-loving (lipophilic). This dual nature allows it to sit at the interface of oil and water droplets, preventing them from separating. It also forms a thin film on the skin, which can help reduce water loss and improve the texture of the product.
Pros
Gentle on skin
Has a low irritation and comedogenic risk, making it suitable for sensitive and acne-prone skin types.
Improves product texture
Creates stable, creamy emulsions that feel smooth and lightweight, enhancing the user experience.
Cons and cautions
Potential manufacturing impurities
PEG compounds can be contaminated with 1,4-dioxane during production, though reputable manufacturers use purification steps to minimize this.
Semi-synthetic nature
Despite being derived from a plant, the PEG modification makes it semi-synthetic, which may not appeal to those seeking fully natural ingredients.
Best for
- People with normal to dry skin looking for a gentle emulsifier in moisturizers
- Those who prefer plant-derived ingredients in their skincare
Use caution if
- Individuals with known allergies to rapeseed or canola oil (rare)
- Those who strictly avoid all PEG compounds due to personal preference
Usage tips
Safety summary
PEG-10 Rapeseed Sterol is considered safe for use in cosmetics at typical concentrations. The main safety concern is potential contamination with 1,4-dioxane, but this is controlled by good manufacturing practices. Skin irritation and allergy are rare.
Research notes
Limited peer-reviewed studies specifically on PEG-10 Rapeseed Sterol, but the safety of PEG derivatives and plant sterols in cosmetics is well-established. The Cosmetic Ingredient Review (CIR) has evaluated similar PEG sterols and found them safe for use.
Common label clues
- Typical concentration
- 0.5% to 3%
- Regulatory status
- Approved for use in cosmetics in the EU, US, and other major markets. The PEG component is subject to purity standards to limit 1,4-dioxane content.
- Common uses
- Moisturizers, Serums, Creams, Sunscreens
- Environmental note
- Rapeseed is a widely cultivated crop, but PEG production is energy-intensive. The ingredient is biodegradable under standard conditions.
Good to know
- Rapeseed sterol is a natural component of rapeseed oil, which is also known as canola oil.
- PEG-10 Rapeseed Sterol is often used in 'natural' or 'green' cosmetic lines as a milder alternative to synthetic emulsifiers.
Common questions
What is PEG-10 Rapeseed Sterol in beauty products?
PEG-10 Rapeseed Sterol is a semi-synthetic ingredient made by attaching a small chain of ethylene glycol (PEG) to a sterol molecule from rapeseed oil. In skincare, it acts as an emulsifier—meaning it helps oil and water mix together so your lotion or cream stays smooth and doesn't separate. It also has mild skin-conditioning properties, leaving skin feeling soft without a heavy residue. Because it's derived from a plant source and has a low irritation profile, it's often used in gentle formulations.
What does PEG-10 Rapeseed Sterol do in a beauty product?
The PEG chain makes the sterol molecule water-loving (hydrophilic), while the sterol part remains oil-loving (lipophilic). This dual nature allows it to sit at the interface of oil and water droplets, preventing them from separating. It also forms a thin film on the skin, which can help reduce water loss and improve the texture of the product.
Is PEG-10 Rapeseed Sterol safe for most people?
PEG-10 Rapeseed Sterol is considered safe for use in cosmetics at typical concentrations. The main safety concern is potential contamination with 1,4-dioxane, but this is controlled by good manufacturing practices. Skin irritation and allergy are rare.
Who should be careful with PEG-10 Rapeseed Sterol?
Individuals with known allergies to rapeseed or canola oil (rare) Those who strictly avoid all PEG compounds due to personal preference
Research sources
Ingredient reviews are educational and are not medical advice. Patch test new products and ask a licensed clinician about persistent irritation, allergies, pregnancy-specific questions, or diagnosed skin conditions.