Ingredient review
Borage Seed Oil Dimethicone Esters
INCI: BORAGE SEED OIL PEG-7 DIMETHICONE ESTERS
A gentle, non-greasy emollient that blends the nourishing profile of borage oil with the elegant feel of silicone — great for dry or sensitive skin.
In plain English
This ingredient is a hybrid molecule made by attaching a small silicone chain to borage seed oil. The result is an oil that spreads easily, feels silky and lightweight on skin, and still delivers the fatty acids (like gamma-linolenic acid) that borage oil is known for. It’s often used to improve the texture of creams and serums without leaving a heavy or sticky residue.
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
Borage Seed Oil Dimethicone Esters 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 Borage Seed Oil Dimethicone Esters.
- 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 formed by reacting borage seed oil with a silicone derivative (PEG-7 dimethicone). It combines the skin-replenishing fatty acids of borage oil with the smooth, non-occlusive feel of silicone.
How it works
It sits on the skin’s surface as a thin, breathable film that helps soften and smooth the skin while reducing water loss. The silicone portion gives it a silky, non-greasy slip, and the borage oil portion provides fatty acids that can help support the skin barrier.
Pros
Lightweight moisture
Delivers the fatty acid benefits of borage oil without the heavy, greasy feel — ideal for layering under makeup or sunscreen.
Elegant texture
Improves the slip and feel of creams and serums, making them easier to apply and more pleasant on the skin.
Cons and cautions
Contains PEGs
PEG compounds are processed with ethylene oxide, which some consumers prefer to avoid due to potential impurities, though cosmetic-grade PEGs are purified.
Silicone content
If you are avoiding silicones for environmental or personal reasons, this ingredient still contains a silicone backbone.
Best for
- People with dry or dehydrated skin looking for a lightweight moisturizer
- Anyone who enjoys a silky, primer-like finish in their skincare
Use caution if
- Those who strictly avoid silicones or PEG derivatives in their routine
Usage tips
Safety summary
Considered safe for topical use at typical cosmetic concentrations. The PEG component is purified to cosmetic-grade standards. Rare reports of mild irritation in very sensitive individuals, but overall irritation and comedogenic risks are low.
Research notes
Borage seed oil itself has been studied for its GLA content and potential to support skin barrier function. The specific ester form is less studied, but its components are well-established as safe and effective emollients in cosmetics.
Common label clues
- Typical concentration
- 1–5% in leave-on products
- Regulatory status
- Approved for cosmetic use in the EU, US, and most major markets. PEG derivatives are regulated and must meet purity standards to limit residual ethylene oxide and 1,4-dioxane.
- Common uses
- Moisturizers, Serums, Primers, Hair conditioners
- Environmental note
- Silicone derivatives can be slow to biodegrade. However, PEG modification may improve water solubility and reduce bioaccumulation potential compared to unmodified silicones.
Good to know
- Borage seed oil is one of the richest natural sources of gamma-linolenic acid (GLA), an omega-6 fatty acid known for supporting skin barrier function.
- The PEG-7 modification makes the oil water-dispersible, so it can be used in rinse-off products like cleansers and conditioners.
Common questions
What is Borage Seed Oil Dimethicone Esters in beauty products?
This ingredient is a hybrid molecule made by attaching a small silicone chain to borage seed oil. The result is an oil that spreads easily, feels silky and lightweight on skin, and still delivers the fatty acids (like gamma-linolenic acid) that borage oil is known for. It’s often used to improve the texture of creams and serums without leaving a heavy or sticky residue.
What does Borage Seed Oil Dimethicone Esters do in a beauty product?
It sits on the skin’s surface as a thin, breathable film that helps soften and smooth the skin while reducing water loss. The silicone portion gives it a silky, non-greasy slip, and the borage oil portion provides fatty acids that can help support the skin barrier.
Is Borage Seed Oil Dimethicone Esters safe for most people?
Considered safe for topical use at typical cosmetic concentrations. The PEG component is purified to cosmetic-grade standards. Rare reports of mild irritation in very sensitive individuals, but overall irritation and comedogenic risks are low.
Who should be careful with Borage Seed Oil Dimethicone Esters?
Those who strictly avoid silicones or PEG derivatives in their routine
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.