Ingredient review
PEG-15 Glyceryl Stearate
INCI: PEG-15 Glyceryl Stearate
A reliable synthetic emulsifier that keeps creams and lotions stable, but may not suit those avoiding PEG compounds.
In plain English
PEG-15 Glyceryl Stearate is a man-made ingredient that helps water and oil mix together in products like moisturizers and cleansers. Without emulsifiers, the oil and water in a lotion would separate. It is made by attaching a chain of ethylene oxide (the PEG part) to glyceryl stearate, a fatty substance derived from plant oils or animal fats. This ingredient is widely used because it creates smooth, stable textures and is generally gentle on skin.
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
- synthetic
- Evidence
- moderate
- Irritation
- low
- Clogging risk
- low
Quick decision guide
Useful, but context matters
PEG-15 Glyceryl Stearate 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-15 Glyceryl Stearate.
- 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 synthetic emulsifier created by reacting ethylene oxide with glyceryl stearate. The 'PEG-15' indicates an average of 15 ethylene oxide units, which determines its water-loving properties.
How it works
It has both water-loving (hydrophilic) and oil-loving (lipophilic) parts, allowing it to sit at the boundary between oil and water droplets. This reduces surface tension and keeps the mixture from separating, giving products a uniform, creamy consistency.
Pros
Effective emulsifier
Helps oil and water mix thoroughly, preventing separation and giving products a consistent, pleasant texture.
Low irritation potential
At typical use levels, it is considered gentle and rarely causes stinging or redness, making it suitable for daily use.
Cons and cautions
Synthetic origin
Made from petrochemical-derived ethylene oxide, which may be a concern for those preferring natural or minimally processed ingredients.
Potential impurities
Manufacturing can leave trace amounts of 1,4-dioxane, a possible contaminant, though reputable brands purify their ingredients to safe levels.
Best for
- People looking for stable, affordable moisturizers and cleansers
- Those with normal to combination skin who tolerate synthetic emulsifiers well
Use caution if
- Individuals with known sensitivity to PEG compounds
- Those seeking strictly natural or plant-based formulations
Usage tips
Safety summary
PEG-15 Glyceryl Stearate is considered safe for cosmetic use at typical concentrations. The main concern is potential trace contamination from manufacturing, which is regulated. It is not a known irritant or sensitizer for most people.
Research notes
The Cosmetic Ingredient Review (CIR) panel has evaluated PEG glyceryl stearates and found them safe as used in cosmetics. Studies show low skin irritation and sensitization potential. No significant human or animal toxicity has been reported at cosmetic exposure levels.
Common label clues
- Typical concentration
- 0.5% to 5%
- Regulatory status
- Approved for use in cosmetics by the FDA and EU Cosmetics Regulation. Manufacturers must ensure low levels of impurities like 1,4-dioxane.
- Common uses
- Moisturizers, Cleansers, Sunscreens, Makeup removers
- Environmental note
- PEG compounds are generally biodegradable, but their production relies on fossil fuels. Some environmental groups prefer plant-based alternatives.
Good to know
- PEG numbers (like 15) indicate the polymer chain length, which affects how water-loving the ingredient is.
- It is often used alongside other emulsifiers to fine-tune texture and feel.
Common questions
What is PEG-15 Glyceryl Stearate in beauty products?
PEG-15 Glyceryl Stearate is a man-made ingredient that helps water and oil mix together in products like moisturizers and cleansers. Without emulsifiers, the oil and water in a lotion would separate. It is made by attaching a chain of ethylene oxide (the PEG part) to glyceryl stearate, a fatty substance derived from plant oils or animal fats. This ingredient is widely used because it creates smooth, stable textures and is generally gentle on skin.
What does PEG-15 Glyceryl Stearate do in a beauty product?
It has both water-loving (hydrophilic) and oil-loving (lipophilic) parts, allowing it to sit at the boundary between oil and water droplets. This reduces surface tension and keeps the mixture from separating, giving products a uniform, creamy consistency.
Is PEG-15 Glyceryl Stearate safe for most people?
PEG-15 Glyceryl Stearate is considered safe for cosmetic use at typical concentrations. The main concern is potential trace contamination from manufacturing, which is regulated. It is not a known irritant or sensitizer for most people.
Who should be careful with PEG-15 Glyceryl Stearate?
Individuals with known sensitivity to PEG compounds Those seeking strictly natural or plant-based formulations
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.