Ingredient review
PEG-6 Glyceryl Tristearate
INCI: PEG-6 Glyceryl Tristearate
A gentle, PEG-based emulsifier that helps create stable, creamy textures in skincare without significant irritation or pore-clogging risk.
In plain English
PEG-6 Glyceryl Tristearate is a helper ingredient that allows oil and water to mix smoothly in your moisturizer or lotion. It's made by attaching a small chain of polyethylene glycol (PEG) to a glycerin and stearic acid molecule. This gives it a mild, non-drying feel and helps the product spread evenly on your skin. It's considered very gentle and unlikely to cause breakouts or irritation for most people.
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-6 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-6 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 semi-synthetic emulsifier created by reacting glycerin with stearic acid (a fatty acid found in cocoa butter and shea butter) and then adding a short chain of polyethylene glycol (PEG-6). It belongs to the glyceryl stearate family, modified for better water solubility.
How it works
It sits at the boundary between oil and water droplets in a formula, reducing surface tension so the two phases stay mixed. This creates a stable, creamy emulsion that feels smooth on the skin and helps deliver other ingredients evenly. It also has mild skin-conditioning properties, leaving a soft, non-greasy afterfeel.
Pros
Gentle on skin
PEG-6 Glyceryl Tristearate has a very low irritation risk, making it suitable for sensitive skin types and daily use in moisturizers.
Stable texture
It helps creams and lotions maintain a smooth, uniform consistency over time, so you don't get separation or a watery layer.
Cons and cautions
PEG purity concerns
As a PEG derivative, trace impurities like 1,4-dioxane can form during manufacturing. However, reputable cosmetic suppliers purify the ingredient to safe levels.
Not fully natural
It is semi-synthetic, so it may not appeal to those seeking 100% natural or biodegradable ingredients.
Best for
- Anyone looking for a gentle, non-irritating moisturizer or lotion
- People with normal to dry skin who want a creamy texture without heavy oils
Use caution if
- Those who prefer completely PEG-free or all-natural formulations (though PEG-6 is considered safe at low levels)
Usage tips
Safety summary
PEG-6 Glyceryl Tristearate is considered safe for cosmetic use at typical concentrations. The main concern is potential contamination with 1,4-dioxane during manufacturing, but reputable suppliers control for this. It is non-irritating and non-comedogenic for most skin types.
Research notes
The Cosmetic Ingredient Review (CIR) panel has reviewed PEG glyceryl stearates and found them safe as used. No significant human or animal studies indicate irritation or sensitization at typical use levels. Most evidence comes from safety assessments rather than efficacy trials.
Common label clues
- Typical concentration
- 1–5%
- Regulatory status
- Approved for use in cosmetics in the EU, US, and many other regions. The Cosmetic Ingredient Review (CIR) panel has deemed it safe as used in rinse-off and leave-on products.
- Common uses
- Moisturizers, Creams, Lotions, Cleansers
- Environmental note
- PEG compounds are not readily biodegradable, but they are used in low concentrations and are generally considered low risk to aquatic life at typical cosmetic usage levels.
Good to know
- PEG-6 Glyceryl Tristearate is often used alongside other emulsifiers like cetearyl alcohol to improve stability.
- It is considered safe by the Cosmetic Ingredient Review (CIR) panel at concentrations up to 25%.
Common questions
What is PEG-6 Glyceryl Tristearate in beauty products?
PEG-6 Glyceryl Tristearate is a helper ingredient that allows oil and water to mix smoothly in your moisturizer or lotion. It's made by attaching a small chain of polyethylene glycol (PEG) to a glycerin and stearic acid molecule. This gives it a mild, non-drying feel and helps the product spread evenly on your skin. It's considered very gentle and unlikely to cause breakouts or irritation for most people.
What does PEG-6 Glyceryl Tristearate do in a beauty product?
It sits at the boundary between oil and water droplets in a formula, reducing surface tension so the two phases stay mixed. This creates a stable, creamy emulsion that feels smooth on the skin and helps deliver other ingredients evenly. It also has mild skin-conditioning properties, leaving a soft, non-greasy afterfeel.
Is PEG-6 Glyceryl Tristearate safe for most people?
PEG-6 Glyceryl Tristearate is considered safe for cosmetic use at typical concentrations. The main concern is potential contamination with 1,4-dioxane during manufacturing, but reputable suppliers control for this. It is non-irritating and non-comedogenic for most skin types.
Who should be careful with PEG-6 Glyceryl Tristearate?
Those who prefer completely PEG-free or all-natural formulations (though PEG-6 is considered safe at low levels)
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.