Ingredient review
PEG-6 Isolaureth-6
INCI: PEG-6 ISOLAURYL THIOETHER
A synthetic surfactant that helps cleansers foam and rinse clean, but may be slightly drying for sensitive skin.
In plain English
PEG-6 Isolaureth-6 is a man-made ingredient that helps oil and water mix in your cleanser. It creates a gentle foam and helps rinse away dirt and makeup. Because it's a surfactant (a type of detergent), it can sometimes strip natural oils if used too often, especially on dry or sensitive 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.
Main practical flags: irritation is moderate; clogging risk is low.
- Source
- synthetic
- Evidence
- moderate
- Irritation
- moderate
- Clogging risk
- low
Quick decision guide
Useful, but context matters
PEG-6 Isolaureth-6 can be useful, but watch for some irritation potential.
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 Isolaureth-6.
- 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
moderateCan bother some users, especially with frequent use, damaged skin, or strong companion ingredients.
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 polyethylene glycol (PEG) derivative combined with a lauryl thioether group, used as a mild surfactant and emulsifier in personal care products.
How it works
It reduces the surface tension between oil and water, allowing them to blend. In a cleanser, it helps lift dirt and oil from the skin so they can be rinsed away with water.
Pros
Mild foaming
Creates a gentle, stable foam that rinses cleanly without the harshness of sulfates.
Good emulsifier
Helps oil and water mix smoothly, improving the texture and stability of creams and cleansers.
Cons and cautions
Potential dryness
Frequent use may strip natural oils, especially for dry or sensitive skin types.
Synthetic origin
Derived from petrochemicals, which some consumers prefer to avoid for environmental or personal reasons.
Best for
- People with normal to oily skin looking for a gentle foaming cleanser
- Those who prefer sulfate-free surfactants
Use caution if
- Individuals with very dry or compromised skin barriers
- Anyone seeking 100% natural ingredients
Usage tips
Safety summary
Considered safe at typical cosmetic concentrations. Mild irritation or dryness is possible for sensitive individuals. Avoid contact with eyes.
Research notes
Limited peer-reviewed studies specifically on PEG-6 Isolaureth-6, but PEG-based surfactants are well-studied and generally regarded as safe in rinse-off products.
Common label clues
- Typical concentration
- 1–5% in rinse-off products; lower in leave-on formulas
- Regulatory status
- Approved for use in cosmetics by the FDA and EU CosIng. No specific restrictions at typical concentrations.
- Common uses
- Cleansers, Shampoos, Body washes, Emulsions
- Environmental note
- PEG compounds are generally biodegradable, but their petrochemical origin raises sustainability concerns compared to plant-based alternatives.
Good to know
- PEG compounds can be contaminated with ethylene oxide during manufacturing, but reputable brands ensure purity.
- This ingredient is often used in 'sulfate-free' cleansers as a milder alternative.
Common questions
What is PEG-6 Isolaureth-6 in beauty products?
PEG-6 Isolaureth-6 is a man-made ingredient that helps oil and water mix in your cleanser. It creates a gentle foam and helps rinse away dirt and makeup. Because it's a surfactant (a type of detergent), it can sometimes strip natural oils if used too often, especially on dry or sensitive skin.
What does PEG-6 Isolaureth-6 do in a beauty product?
It reduces the surface tension between oil and water, allowing them to blend. In a cleanser, it helps lift dirt and oil from the skin so they can be rinsed away with water.
Is PEG-6 Isolaureth-6 safe for most people?
Considered safe at typical cosmetic concentrations. Mild irritation or dryness is possible for sensitive individuals. Avoid contact with eyes.
Who should be careful with PEG-6 Isolaureth-6?
Individuals with very dry or compromised skin barriers Anyone seeking 100% natural ingredients
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.