Ingredient review
Phytosteryl/Behenyl Dimer Dilinoleate
INCI: PHYTOSTERYL/BEHENYL DIMER DILINOLEATE
A gentle, plant-based emollient that helps soften skin and support the moisture barrier without clogging pores.
In plain English
This ingredient is a type of oil-like substance made from plant sterols (phytosterols) and behenyl alcohol (from rapeseed or coconut) combined with a fatty acid from sunflower or safflower oil. It sits on the skin's surface to reduce water loss and make skin feel smooth and soft. Think of it as a lightweight, non-greasy moisturizer that also helps strengthen your skin's natural barrier.
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
Phytosteryl/Behenyl Dimer Dilinoleate 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 Phytosteryl/Behenyl Dimer Dilinoleate.
- 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 ester created by combining phytosterols (plant-derived compounds similar to cholesterol) with behenyl alcohol and dimer dilinoleic acid (a fatty acid from plant oils). It is a viscous, oil-soluble ingredient used in skincare for its emollient and barrier-supporting properties.
How it works
When applied to the skin, it forms a thin, breathable film that slows down water evaporation (transepidermal water loss, or TEWL). This helps keep skin hydrated and plump. The phytosterol portion may also mimic natural skin lipids, supporting the structure of the skin barrier and reducing irritation from other ingredients.
Pros
Gentle on sensitive skin
This ingredient has a very low irritation risk and is well-tolerated even by those with reactive skin, making it a safe choice for soothing moisturizers.
Non-comedogenic
It does not clog pores, so it can be used in formulations for normal to dry skin without causing breakouts.
Cons and cautions
Less researched than alternatives
Compared to squalane or jojoba oil, there are fewer published studies on this specific ester, so its long-term benefits are less documented.
Potential heaviness for oily skin
In high concentrations, it may feel slightly rich or heavy on very oily skin, though it is generally lightweight.
Best for
- People with dry or dehydrated skin looking for a non-irritating moisturizer
- Those with sensitive skin who want a gentle emollient that supports the barrier
Use caution if
- Individuals with very oily or acne-prone skin may prefer lighter emollients like squalane
Usage tips
Safety summary
Considered safe for use in cosmetics at typical concentrations. Low irritation and comedogenic risk. No significant safety concerns reported in regulatory reviews.
Research notes
Research on phytosterol esters shows they can improve skin barrier function and reduce water loss. However, specific studies on this exact compound are limited; most evidence comes from related phytosterol-based ingredients.
Common label clues
- Typical concentration
- 1% to 5%
- Regulatory status
- Approved for use in cosmetics by the FDA and EU CosIng database as a skin-conditioning agent. No known restrictions.
- Common uses
- Moisturizers, Anti-aging creams, Lip products, Eye creams
- Environmental note
- Derived from plant oils (sunflower, rapeseed, coconut) and behenyl alcohol, which are renewable resources. Biodegradability is expected to be moderate.
Good to know
- Phytosterols are plant compounds that structurally resemble cholesterol, a key component of healthy skin.
- This ingredient is often used in 'clean beauty' formulations because it is derived from renewable plant sources.
Common questions
What is Phytosteryl/Behenyl Dimer Dilinoleate in beauty products?
This ingredient is a type of oil-like substance made from plant sterols (phytosterols) and behenyl alcohol (from rapeseed or coconut) combined with a fatty acid from sunflower or safflower oil. It sits on the skin's surface to reduce water loss and make skin feel smooth and soft. Think of it as a lightweight, non-greasy moisturizer that also helps strengthen your skin's natural barrier.
What does Phytosteryl/Behenyl Dimer Dilinoleate do in a beauty product?
When applied to the skin, it forms a thin, breathable film that slows down water evaporation (transepidermal water loss, or TEWL). This helps keep skin hydrated and plump. The phytosterol portion may also mimic natural skin lipids, supporting the structure of the skin barrier and reducing irritation from other ingredients.
Is Phytosteryl/Behenyl Dimer Dilinoleate safe for most people?
Considered safe for use in cosmetics at typical concentrations. Low irritation and comedogenic risk. No significant safety concerns reported in regulatory reviews.
Who should be careful with Phytosteryl/Behenyl Dimer Dilinoleate?
Individuals with very oily or acne-prone skin may prefer lighter emollients like squalane
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.