Ingredient review
PEG-10 Glyceryl Tristearate
INCI: PEG-10 Glyceryl Tristearate
A gentle synthetic emulsifier that helps water and oil mix in your creams and lotions, with a low risk of irritation.
In plain English
PEG-10 Glyceryl Tristearate is a man-made ingredient that acts like a bridge between water and oil. In your moisturizer or cleanser, it keeps the formula smooth and prevents it from separating into layers. The 'PEG' part means it's made with polyethylene glycol, a common emulsifying building block, and 'glyceryl tristearate' comes from glycerin and stearic acid (a fatty acid found in cocoa butter and shea butter). It's considered very 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-10 Glyceryl Tristearate 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 Glyceryl Tristearate.
- 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 polyethylene glycol (PEG) with glyceryl tristearate, a fat derived from glycerin and stearic acid.
How it works
Its molecule has a water-loving (hydrophilic) end and an oil-loving (lipophilic) end, allowing it to surround oil droplets and suspend them in water. This creates a stable, uniform cream or lotion that doesn't separate.
Pros
Gentle on skin
PEG-10 Glyceryl Tristearate has a very low irritation risk, making it suitable for sensitive skin types and daily use.
Excellent stabilizer
It keeps oil and water mixed evenly, so your product stays smooth and effective from first use to last.
Cons and cautions
Potential manufacturing impurities
Like all PEG compounds, it may contain trace impurities such as ethylene oxide or 1,4-dioxane if not properly purified. Reputable manufacturers test for these.
Not biodegradable
This synthetic ingredient does not break down easily in the environment, which may be a drawback for eco-conscious consumers.
Best for
- Anyone using creams, lotions, or sunscreens who wants a stable, non-irritating formula
- People with sensitive or reactive skin looking for gentle emulsifiers
Use caution if
- Those who strictly avoid all synthetic or PEG-based ingredients for personal or environmental reasons
Usage tips
Safety summary
Considered safe for cosmetic use at typical concentrations. The main concern is potential contamination with ethylene oxide or 1,4-dioxane during manufacturing, but these are regulated and tested by reputable suppliers.
Research notes
The Cosmetic Ingredient Review (CIR) panel has evaluated PEG compounds and found them safe when formulated to minimize impurities. Specific studies on PEG-10 Glyceryl Tristearate are limited, but its chemical class is well-understood.
Common label clues
- Typical concentration
- 1–5%
- Regulatory status
- Approved for use in cosmetics by the FDA and EU CosIng database. Manufacturers must ensure low levels of impurities like 1,4-dioxane.
- Common uses
- Moisturizers, Cleansers, Sunscreens, Makeup removers
- Environmental note
- PEG-10 Glyceryl Tristearate is synthetic and not readily biodegradable. It may persist in water systems after washing off.
Good to know
- PEG numbers (like '10') indicate the average number of ethylene oxide units, which affects how water- or oil-loving the molecule is.
- This ingredient is often used alongside other emulsifiers to create a balanced formula.
Common questions
What is PEG-10 Glyceryl Tristearate in beauty products?
PEG-10 Glyceryl Tristearate is a man-made ingredient that acts like a bridge between water and oil. In your moisturizer or cleanser, it keeps the formula smooth and prevents it from separating into layers. The 'PEG' part means it's made with polyethylene glycol, a common emulsifying building block, and 'glyceryl tristearate' comes from glycerin and stearic acid (a fatty acid found in cocoa butter and shea butter). It's considered very gentle on skin.
What does PEG-10 Glyceryl Tristearate do in a beauty product?
Its molecule has a water-loving (hydrophilic) end and an oil-loving (lipophilic) end, allowing it to surround oil droplets and suspend them in water. This creates a stable, uniform cream or lotion that doesn't separate.
Is PEG-10 Glyceryl Tristearate safe for most people?
Considered safe for cosmetic use at typical concentrations. The main concern is potential contamination with ethylene oxide or 1,4-dioxane during manufacturing, but these are regulated and tested by reputable suppliers.
Who should be careful with PEG-10 Glyceryl Tristearate?
Those who strictly avoid all synthetic or PEG-based ingredients for personal or environmental reasons
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.