Ingredient review
PEG-10 Isolaureth-6
INCI: PEG-10 ISOLAURYL THIOETHER
A synthetic cleansing agent that helps remove dirt and oil, but may be drying or irritating for sensitive skin.
In plain English
PEG-10 Isolaureth-6 is a man-made ingredient that helps cleansers foam up and mix water with oils so they can wash away dirt and makeup. It belongs to a family of ingredients called PEGs (polyethylene glycols), which are common in many personal care products. While effective at cleaning, it can strip the skin of its natural moisture barrier if used too often, especially in high concentrations.
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-10 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-10 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 synthetic surfactant made by reacting lauryl alcohol with ethylene oxide and adding a thioether group. It is part of the PEG family and functions as a cleansing and emulsifying agent.
How it works
It reduces the surface tension between water and oil, allowing them to mix. This helps lift dirt, sebum, and makeup from the skin so they can be rinsed away. In emulsions, it helps keep oil and water blended into a stable cream or lotion.
Pros
Effective cleanser
Removes excess oil, dirt, and makeup efficiently, making it useful in foaming cleansers and shampoos.
Good emulsifier
Helps create stable, smooth creams and lotions that don't separate over time.
Cons and cautions
Potential irritation
Can strip natural oils and disrupt the skin barrier, leading to dryness or irritation, especially in leave-on products.
Manufacturing concerns
As a PEG compound, it may contain trace levels of 1,4-dioxane, a potential contaminant, though reputable manufacturers purify it.
Best for
- People with normal to oily skin looking for a strong cleanser
- Those who prefer synthetic surfactants over sulfates
Use caution if
- People with dry, sensitive, or compromised skin barriers
- Anyone with known sensitivity to PEG compounds
Usage tips
Safety summary
PEG-10 Isolaureth-6 is considered safe for use in cosmetics at typical concentrations, but may cause irritation in sensitive individuals. As with all PEGs, there is a theoretical concern about 1,4-dioxane contamination, but reputable manufacturers keep levels well below safety limits.
Research notes
Limited peer-reviewed studies specifically on this ingredient, but the broader PEG family has been reviewed by the Cosmetic Ingredient Review (CIR) panel and deemed safe for use in cosmetics when formulated properly.
Common label clues
- Typical concentration
- 1–5% in rinse-off products; lower in leave-on formulas
- Regulatory status
- Approved for use in cosmetics in the US, EU, and many other regions, with concentration limits in some countries.
- Common uses
- Cleansers, Shampoos, Body washes, Emulsions
- Environmental note
- PEG compounds are generally biodegradable, but their production involves petrochemicals. Some environmental groups recommend choosing plant-based alternatives when possible.
Good to know
- PEGs are widely used in cosmetics and are generally considered safe at low concentrations.
- Look for products from brands that test for 1,4-dioxane purity.
Common questions
What is PEG-10 Isolaureth-6 in beauty products?
PEG-10 Isolaureth-6 is a man-made ingredient that helps cleansers foam up and mix water with oils so they can wash away dirt and makeup. It belongs to a family of ingredients called PEGs (polyethylene glycols), which are common in many personal care products. While effective at cleaning, it can strip the skin of its natural moisture barrier if used too often, especially in high concentrations.
What does PEG-10 Isolaureth-6 do in a beauty product?
It reduces the surface tension between water and oil, allowing them to mix. This helps lift dirt, sebum, and makeup from the skin so they can be rinsed away. In emulsions, it helps keep oil and water blended into a stable cream or lotion.
Is PEG-10 Isolaureth-6 safe for most people?
PEG-10 Isolaureth-6 is considered safe for use in cosmetics at typical concentrations, but may cause irritation in sensitive individuals. As with all PEGs, there is a theoretical concern about 1,4-dioxane contamination, but reputable manufacturers keep levels well below safety limits.
Who should be careful with PEG-10 Isolaureth-6?
People with dry, sensitive, or compromised skin barriers Anyone with known sensitivity to PEG compounds
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.