Ingredient review
PEG-24 Lanolin
INCI: PEG-24 Lanolin
A gentle, water-soluble lanolin derivative that helps blend oil and water in formulas while adding mild conditioning.
In plain English
PEG-24 Lanolin is a modified version of lanolin (a natural oil from sheep's wool) that has been treated with polyethylene glycol to make it dissolve in water. This allows it to act as an emulsifier, helping oil and water mix smoothly in creams and lotions. It also leaves a light, non-greasy feel on the skin and provides mild moisturizing properties.
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-24 Lanolin 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-24 Lanolin.
- 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 ingredient created by reacting lanolin with 24 units of ethylene oxide, producing a water-soluble, non-ionic surfactant and emulsifier.
How it works
It reduces surface tension between oil and water phases, allowing stable emulsions to form. It also deposits a thin conditioning film on the skin or hair, improving texture and softness without heavy residue.
Pros
Water-soluble lanolin
Unlike plain lanolin, PEG-24 Lanolin dissolves in water, making it easier to formulate into rinse-off and leave-on products without greasiness.
Gentle emulsifier
It helps create stable, smooth emulsions at low concentrations, improving product texture without heavy irritation risk.
Cons and cautions
Potential lanolin allergen
If you have a known allergy to lanolin or wool, this derivative may still trigger a reaction, so patch testing is wise.
Ethoxylation concerns
The manufacturing process can generate trace amounts of 1,4-dioxane, a potential contaminant, though reputable brands purify to safe levels.
Best for
- People with normal to dry skin looking for gentle emulsifiers
- Those who prefer water-soluble conditioning ingredients
Use caution if
- Individuals with known lanolin allergy or wool sensitivity
- Those seeking completely natural or non-ethoxylated ingredients
Usage tips
Safety summary
PEG-24 Lanolin is considered safe for cosmetic use at typical concentrations. The main concern is potential allergy in lanolin-sensitive individuals and trace 1,4-dioxane from ethoxylation, which is minimized by purification.
Research notes
The Cosmetic Ingredient Review (CIR) panel has evaluated PEG lanolin derivatives and found them safe for use in cosmetics. No significant human or animal toxicity has been reported at typical exposure levels.
Common label clues
- Typical concentration
- 1–10% in rinse-off products; 0.5–5% in leave-on products
- Regulatory status
- Approved for use in cosmetics in the EU, US, and many other regions, with no concentration restrictions beyond good manufacturing practice.
- Common uses
- Moisturizers, Cleansers, Hair conditioners, Makeup removers
- Environmental note
- Lanolin is a byproduct of wool production, making it a renewable resource. The ethoxylation process uses ethylene oxide, which requires careful industrial handling.
Good to know
- PEG-24 Lanolin is considered safe by the Cosmetic Ingredient Review (CIR) panel when used as directed.
- It is often used in hypoallergenic formulations because of its low irritation potential.
Common questions
What is PEG-24 Lanolin in beauty products?
PEG-24 Lanolin is a modified version of lanolin (a natural oil from sheep's wool) that has been treated with polyethylene glycol to make it dissolve in water. This allows it to act as an emulsifier, helping oil and water mix smoothly in creams and lotions. It also leaves a light, non-greasy feel on the skin and provides mild moisturizing properties.
What does PEG-24 Lanolin do in a beauty product?
It reduces surface tension between oil and water phases, allowing stable emulsions to form. It also deposits a thin conditioning film on the skin or hair, improving texture and softness without heavy residue.
Is PEG-24 Lanolin safe for most people?
PEG-24 Lanolin is considered safe for cosmetic use at typical concentrations. The main concern is potential allergy in lanolin-sensitive individuals and trace 1,4-dioxane from ethoxylation, which is minimized by purification.
Who should be careful with PEG-24 Lanolin?
Individuals with known lanolin allergy or wool sensitivity Those seeking completely natural or non-ethoxylated ingredients
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.