Ingredient review
PEG-120 Methyl Glucose Dioleate
INCI: PEG-120 Methyl Glucose Dioleate
A mild, non-drying surfactant that helps create a rich lather without stripping the skin or scalp.
In plain English
PEG-120 Methyl Glucose Dioleate is a gentle cleansing ingredient made from glucose (a sugar) and oleic acid (a fatty acid from plants). It helps shampoos and body washes foam up nicely while being much less harsh than traditional sulfates. Because it's derived from natural sources and processed to be mild, it's a popular choice for sensitive skin and hair formulas.
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-120 Methyl Glucose Dioleate 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-120 Methyl Glucose Dioleate.
- 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 surfactant created by reacting methyl glucose (from corn or wheat) with oleic acid (from olive or other vegetable oils) and ethylene oxide (PEG). It belongs to the class of non-ionic surfactants, meaning it cleans without a strong electrical charge, which reduces irritation.
How it works
It lowers the surface tension between water and oil, allowing dirt and excess sebum to be rinsed away. It also thickens the formula and stabilizes foam, giving a luxurious lather without the harshness of sulfates.
Pros
Very mild cleanser
Unlike sodium lauryl sulfate, this ingredient cleans without stripping the skin's natural moisture barrier, making it ideal for daily use on sensitive or dry skin.
Enhances foam texture
It boosts the richness and stability of lather in sulfate-free formulas, so you still get a satisfying foam without harsh detergents.
Cons and cautions
Contains PEG compounds
PEGs can be contaminated with ethylene oxide or 1,4-dioxane during manufacturing, though reputable brands purify them to safe levels. Some consumers avoid PEGs for this reason.
Not fully natural
Despite being derived from plant sources, it undergoes chemical processing (ethoxylation), so it doesn't qualify as a natural ingredient for strict clean beauty standards.
Best for
- People with dry or sensitive skin
- Those looking for sulfate-free hair and body cleansers
Use caution if
- Individuals who prefer completely PEG-free or 100% natural ingredient lists
Usage tips
Safety summary
Considered safe for use in rinse-off cosmetics 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 people.
Research notes
Safety assessments by the Cosmetic Ingredient Review (CIR) panel have concluded that PEG derivatives are safe when formulated to meet purity standards. Studies show low skin irritation and sensitization potential for this class of surfactants.
Common label clues
- Typical concentration
- 1–5% in rinse-off products
- Regulatory status
- Approved for use in cosmetics by the FDA and EU CosIng database. Manufacturers are required to limit impurities like 1,4-dioxane to safe levels.
- Common uses
- Shampoos, Body washes, Facial cleansers, Liquid soaps
- Environmental note
- PEG-120 Methyl Glucose Dioleate is not readily biodegradable, so it may persist in water systems longer than some plant-based alternatives.
Good to know
- It is often used alongside other mild surfactants like cocamidopropyl betaine to balance cleansing and foam.
- The 'PEG-120' number refers to the average length of the polyethylene glycol chain, which affects its solubility and mildness.
Common questions
What is PEG-120 Methyl Glucose Dioleate in beauty products?
PEG-120 Methyl Glucose Dioleate is a gentle cleansing ingredient made from glucose (a sugar) and oleic acid (a fatty acid from plants). It helps shampoos and body washes foam up nicely while being much less harsh than traditional sulfates. Because it's derived from natural sources and processed to be mild, it's a popular choice for sensitive skin and hair formulas.
What does PEG-120 Methyl Glucose Dioleate do in a beauty product?
It lowers the surface tension between water and oil, allowing dirt and excess sebum to be rinsed away. It also thickens the formula and stabilizes foam, giving a luxurious lather without the harshness of sulfates.
Is PEG-120 Methyl Glucose Dioleate safe for most people?
Considered safe for use in rinse-off cosmetics 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 people.
Who should be careful with PEG-120 Methyl Glucose Dioleate?
Individuals who prefer completely PEG-free or 100% natural ingredient lists
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.