Ingredient review
PEG-45 Palm Kernel Glycerides
INCI: PEG-45 PALM KERNEL GLYCERIDES
A gentle emulsifier that helps blend oil and water in skincare products, generally well-tolerated but derived from palm kernel oil, which raises sustainability concerns.
In plain English
PEG-45 Palm Kernel Glycerides is a semi-synthetic ingredient made by attaching polyethylene glycol (PEG) chains to glycerides from palm kernel oil. In skincare, it acts as an emulsifier, meaning it helps mix oil and water so that products like lotions and cleansers have a smooth, stable texture. It also has mild skin-conditioning properties, leaving skin feeling soft. Because it contains PEG, it may be processed with ethylene oxide, which can leave trace impurities, but cosmetic-grade versions are purified to safe levels. The palm kernel source also raises environmental questions about deforestation.
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-45 Palm Kernel Glycerides 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-45 Palm Kernel Glycerides.
- 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 emulsifier created by reacting palm kernel glycerides with PEG (polyethylene glycol). It is a waxy solid that helps stabilize oil-in-water emulsions.
How it works
Its PEG chain makes it water-soluble while the glyceride portion is oil-soluble, allowing it to position itself at the interface of oil and water droplets. This reduces surface tension and keeps the mixture from separating, giving products a uniform consistency.
Pros
Effective emulsifier
Helps oil and water mix smoothly, giving products a consistent, pleasant texture that doesn't separate.
Low irritation
Rated low on irritation scales, making it suitable for sensitive skin types when used in standard concentrations.
Cons and cautions
Palm oil sourcing
Derived from palm kernel oil, which is associated with environmental concerns like deforestation unless certified sustainable.
Potential impurities
As a PEG compound, it may contain trace levels of ethylene oxide or 1,4-dioxane if manufacturing purification is inadequate, though cosmetic-grade is generally safe.
Best for
- People who use lotions, creams, or cleansers and want a stable, non-greasy texture
- Those with normal to dry skin looking for gentle emulsifiers
Use caution if
- Individuals who strictly avoid palm-derived ingredients for environmental reasons
- Those with known sensitivity to PEG compounds (rare)
Usage tips
Safety summary
PEG-45 Palm Kernel Glycerides is considered safe for cosmetic use at typical concentrations. The main concerns are potential trace impurities from PEG manufacturing and the environmental impact of palm oil sourcing. Regulatory bodies like the CIR have reviewed PEG compounds and found them safe when properly purified.
Research notes
The Cosmetic Ingredient Review (CIR) has evaluated PEG compounds and concluded they are safe for use in cosmetics when formulated to minimize impurities. Studies on palm kernel oil derivatives focus more on sustainability than safety, with no significant toxicity concerns reported for topical use.
Common label clues
- Typical concentration
- 1-5% in most formulations
- Regulatory status
- Approved for use in cosmetics by the FDA and EU CosIng database. The Cosmetic Ingredient Review (CIR) panel has deemed PEG compounds safe as used in cosmetics when properly purified.
- Common uses
- Cleansers, Moisturizers, Makeup removers, Lotions
- Environmental note
- Palm kernel oil production can contribute to deforestation and biodiversity loss. Choosing products with RSPO-certified palm oil helps support more sustainable practices.
Good to know
- PEG numbers (like 45) indicate the average number of ethylene glycol units, which affects water solubility and texture.
- This ingredient is often found in rinse-off products like cleansers and makeup removers.
Common questions
What is PEG-45 Palm Kernel Glycerides in beauty products?
PEG-45 Palm Kernel Glycerides is a semi-synthetic ingredient made by attaching polyethylene glycol (PEG) chains to glycerides from palm kernel oil. In skincare, it acts as an emulsifier, meaning it helps mix oil and water so that products like lotions and cleansers have a smooth, stable texture. It also has mild skin-conditioning properties, leaving skin feeling soft. Because it contains PEG, it may be processed with ethylene oxide, which can leave trace impurities, but cosmetic-grade versions are purified to safe levels. The palm kernel source also raises environmental questions about deforestation.
What does PEG-45 Palm Kernel Glycerides do in a beauty product?
Its PEG chain makes it water-soluble while the glyceride portion is oil-soluble, allowing it to position itself at the interface of oil and water droplets. This reduces surface tension and keeps the mixture from separating, giving products a uniform consistency.
Is PEG-45 Palm Kernel Glycerides safe for most people?
PEG-45 Palm Kernel Glycerides is considered safe for cosmetic use at typical concentrations. The main concerns are potential trace impurities from PEG manufacturing and the environmental impact of palm oil sourcing. Regulatory bodies like the CIR have reviewed PEG compounds and found them safe when properly purified.
Who should be careful with PEG-45 Palm Kernel Glycerides?
Individuals who strictly avoid palm-derived ingredients for environmental reasons Those 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.