Ingredient review
PEG-6 Glyceryl Caprate
INCI: PEG-6 Glyceryl Caprate
A gentle, water-friendly emollient that helps products spread smoothly without leaving a greasy feel.
In plain English
PEG-6 Glyceryl Caprate is a semi-synthetic ingredient made from glycerin and capric acid (a fatty acid from coconut or palm oil). It acts as a mild emulsifier and skin softener. In a formula, it helps water and oil mix together, making the product feel light and silky on your skin. It is often used in cleansers and moisturizers to improve texture and leave skin feeling smooth without a heavy 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
PEG-6 Glyceryl Caprate 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-6 Glyceryl Caprate.
- 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 polyethylene glycol (PEG) derivative of glyceryl caprate, created by reacting glycerin with capric acid and ethylene oxide. It is a clear to slightly hazy liquid that dissolves easily in water.
How it works
It reduces the surface tension between oil and water, allowing them to blend into a stable emulsion. At the same time, it deposits a thin, non-greasy film on the skin that helps lock in moisture and gives a soft, smooth feel.
Pros
Lightweight feel
Unlike heavier oils, PEG-6 Glyceryl Caprate absorbs quickly and leaves no sticky or greasy residue, making it ideal for daytime moisturizers and gel-based cleansers.
Gentle on skin
It has a low irritation and comedogenic rating, so it is unlikely to clog pores or cause redness, even for sensitive skin types.
Cons and cautions
Sourcing concerns
Capric acid is often derived from palm or coconut oil. If not sustainably sourced, palm oil production can contribute to deforestation.
Processing impurities
As a PEG compound, trace amounts of ethylene oxide or 1,4-dioxane can remain if manufacturing is not carefully controlled. Reputable brands ensure purification.
Best for
- People with normal to combination skin who want a lightweight moisturizer
- Those who prefer non-greasy, fast-absorbing products
Use caution if
- Individuals with known sensitivity to PEG compounds (rare)
Usage tips
Safety summary
PEG-6 Glyceryl Caprate is considered safe for cosmetic use at typical concentrations. It has low skin irritation and sensitization potential. As with all PEGs, quality manufacturing ensures minimal impurities. The Cosmetic Ingredient Review (CIR) panel has reviewed similar PEG glyceryl esters and found them safe.
Research notes
Limited direct clinical studies on PEG-6 Glyceryl Caprate specifically, but its chemical relatives (PEG glyceryl esters) are well-studied and recognized as safe by the CIR. Research focuses on its function as a mild emulsifier and emollient with good skin compatibility.
Common label clues
- Typical concentration
- 0.5% to 5%
- Regulatory status
- Approved for use in cosmetics by the FDA (as a generally recognized safe ingredient) and by the EU CosIng database. No concentration restrictions are imposed, but typical use is under 5%.
- Common uses
- Cleansers, Moisturizers, Serums, Toners
- Environmental note
- Derived from plant-based fatty acids, but the PEG process uses ethylene oxide, a petrochemical. Sustainable sourcing of the capric acid (e.g., RSPO-certified palm) can reduce environmental impact.
Good to know
- PEG-6 Glyceryl Caprate is considered biodegradable and is not classified as a hazardous substance by major cosmetic safety panels.
- It is often used in 'water cream' textures that feel like a gel but moisturize like a lotion.
Common questions
What is PEG-6 Glyceryl Caprate in beauty products?
PEG-6 Glyceryl Caprate is a semi-synthetic ingredient made from glycerin and capric acid (a fatty acid from coconut or palm oil). It acts as a mild emulsifier and skin softener. In a formula, it helps water and oil mix together, making the product feel light and silky on your skin. It is often used in cleansers and moisturizers to improve texture and leave skin feeling smooth without a heavy residue.
What does PEG-6 Glyceryl Caprate do in a beauty product?
It reduces the surface tension between oil and water, allowing them to blend into a stable emulsion. At the same time, it deposits a thin, non-greasy film on the skin that helps lock in moisture and gives a soft, smooth feel.
Is PEG-6 Glyceryl Caprate safe for most people?
PEG-6 Glyceryl Caprate is considered safe for cosmetic use at typical concentrations. It has low skin irritation and sensitization potential. As with all PEGs, quality manufacturing ensures minimal impurities. The Cosmetic Ingredient Review (CIR) panel has reviewed similar PEG glyceryl esters and found them safe.
Who should be careful with PEG-6 Glyceryl Caprate?
Individuals with known sensitivity to PEG compounds (rare)
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.