Ingredient review
Polyglyceryl-3 Stearate/Isostearate/Dimer Dilinoleate Copolymer
INCI: Polyglyceryl-3 Stearate/Isostearate/Dimer Dilinoleate Copolymer
A gentle, plant-derived emulsifier that helps create stable, creamy textures without common irritation concerns.
In plain English
This ingredient is a helper molecule that allows oil and water to mix smoothly in your skincare products, giving them a creamy, stable texture. It's made from glycerin (a natural humectant) and fatty acids, so it's considered gentle and unlikely to clog pores or cause irritation. You'll find it in lotions, creams, and sunscreens where it keeps the formula from separating and helps it spread evenly on your 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
- semi synthetic
- Evidence
- moderate
- Irritation
- low
- Clogging risk
- low
Quick decision guide
Useful, but context matters
Polyglyceryl-3 Stearate/Isostearate/Dimer Dilinoleate Copolymer 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 Polyglyceryl-3 Stearate/Isostearate/Dimer Dilinoleate Copolymer.
- 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 polymer made by linking glycerin with stearic, isostearic, and dimer dilinoleic acids. It belongs to the polyglyceryl ester family, known for being milder than traditional emulsifiers.
How it works
It reduces the surface tension between oil and water, allowing them to form a stable emulsion. This prevents the product from separating into layers and gives a smooth, non-greasy feel when applied to the skin.
Pros
Gentle on skin
Made from glycerin and fatty acids, it has a low irritation risk and is well-tolerated even by sensitive skin types.
Improves product stability
It prevents oil and water from separating, so your moisturizer or sunscreen stays effective and consistent throughout its shelf life.
Cons and cautions
Can feel heavy for oily skin
In formulas with high concentrations, it may leave a slightly rich or tacky feel that some with oily skin find uncomfortable.
Limited independent safety data
While generally regarded as safe, there are fewer long-term studies on this specific copolymer compared to more common emulsifiers.
Best for
- People with normal to dry skin looking for rich, stable moisturizers
- Those with sensitive skin who react to harsher emulsifiers
Use caution if
- Individuals with extremely oily or acne-prone skin may prefer lighter emulsifiers
Usage tips
Safety summary
Considered safe for cosmetic use with low irritation and comedogenic potential. No significant safety concerns reported in regulatory reviews.
Research notes
Safety is supported by industry self-assessments and regulatory approvals. Peer-reviewed studies on this specific copolymer are sparse, but the polyglyceryl ester family is well-studied and generally recognized as safe.
Common label clues
- Typical concentration
- 1% to 5%
- Regulatory status
- Approved for use in cosmetics by the FDA and EU CosIng database. No known restrictions at typical use levels.
- Common uses
- Moisturizers, Sunscreens, Serums, Creams, Lotions
- Environmental note
- Derived from renewable plant sources, but the polymerization process may involve synthetic steps. Biodegradability data is limited.
Good to know
- This ingredient is often used in 'natural' or 'green' formulations because it's derived from plant-based glycerin.
- It is not a preservative, so products containing it still need a proper preservation system.
Common questions
What is Polyglyceryl-3 Stearate/Isostearate/Dimer Dilinoleate Copolymer in beauty products?
This ingredient is a helper molecule that allows oil and water to mix smoothly in your skincare products, giving them a creamy, stable texture. It's made from glycerin (a natural humectant) and fatty acids, so it's considered gentle and unlikely to clog pores or cause irritation. You'll find it in lotions, creams, and sunscreens where it keeps the formula from separating and helps it spread evenly on your skin.
What does Polyglyceryl-3 Stearate/Isostearate/Dimer Dilinoleate Copolymer do in a beauty product?
It reduces the surface tension between oil and water, allowing them to form a stable emulsion. This prevents the product from separating into layers and gives a smooth, non-greasy feel when applied to the skin.
Is Polyglyceryl-3 Stearate/Isostearate/Dimer Dilinoleate Copolymer safe for most people?
Considered safe for cosmetic use with low irritation and comedogenic potential. No significant safety concerns reported in regulatory reviews.
Who should be careful with Polyglyceryl-3 Stearate/Isostearate/Dimer Dilinoleate Copolymer?
Individuals with extremely oily or acne-prone skin may prefer lighter emulsifiers
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.