Ingredient review
PEG-27 Lanolin
INCI: PEG-27 Lanolin
PEG-27 Lanolin is a modified lanolin that adds water solubility, making it a versatile emollient and mild cleanser, but it may be moderately comedogenic for acne-prone skin.
In plain English
PEG-27 Lanolin is a version of lanolin (a waxy substance from sheep's wool) that has been treated with polyethylene glycol (PEG) to make it mix with water. This means it can be used in water-based products like lotions and cleansers to soften skin and help remove dirt without feeling greasy. However, because it's derived from lanolin, it may still clog pores in some people.
Review score
Safety, usefulness, and evidence
Potentially useful with some tradeoffs
The evidence base is useful, but some claims depend heavily on the formula.
Main practical flags: irritation is low; clogging risk is moderate.
- Source
- semi synthetic
- Evidence
- moderate
- Irritation
- low
- Clogging risk
- moderate
Quick decision guide
Useful, but context matters
PEG-27 Lanolin can be useful, but watch for possible clogging concerns.
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-27 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
moderateMay be fine for many users but deserves caution if you are breakout-prone.
Evidence level
moderateThere is useful support, but formula details and claim strength still matter.
What it is
PEG-27 Lanolin is a semi-synthetic ingredient created by reacting lanolin with ethylene oxide (PEG). This process makes the naturally water-repellent lanolin water-soluble, allowing it to function as both an emollient (softening agent) and a surfactant (cleansing agent) in cosmetic formulations.
How it works
In a cosmetic product, PEG-27 Lanolin works by reducing surface tension between water and oil, helping to blend ingredients and improve texture. As an emollient, it forms a thin film on the skin that locks in moisture and leaves a smooth feel. As a surfactant, it helps lift dirt and oil from the skin's surface, making it useful in cleansers.
Pros
Water-soluble emollient
Unlike regular lanolin, PEG-27 Lanolin mixes easily with water, making it suitable for lightweight lotions and cleansers without a greasy residue.
Mild cleansing action
It helps remove dirt and oil gently, making it a good option for sensitive skin that reacts to harsher surfactants.
Cons and cautions
Moderate comedogenic risk
Because it's derived from lanolin, it may clog pores in acne-prone individuals, potentially leading to breakouts.
Potential for impurities
The PEG process can introduce trace contaminants like ethylene oxide or 1,4-dioxane if not properly purified, though reputable manufacturers control for this.
Best for
- People with dry or normal skin looking for a gentle emollient
- Those who tolerate lanolin well and want a water-soluble version
Use caution if
- Individuals with known lanolin allergy or sensitivity
- Acne-prone skin that clogs easily with waxy ingredients
Usage tips
Safety summary
PEG-27 Lanolin is generally considered safe for most skin types when used in typical cosmetic concentrations. The main concerns are potential comedogenicity and rare allergic reactions in lanolin-sensitive individuals. Regulatory bodies allow its use with standard purity controls.
Research notes
Research on PEG-27 Lanolin specifically is limited, but studies on ethoxylated lanolin derivatives indicate they are mild and well-tolerated. The Cosmetic Ingredient Review (CIR) has evaluated PEG lanolin derivatives and found them safe for use in cosmetics when formulated properly.
Common label clues
- Typical concentration
- 1% to 5% in leave-on products; up to 10% in rinse-off products
- Regulatory status
- Approved for use in cosmetics by the FDA and EU CosIng database. Manufacturers are expected to follow purity guidelines to minimize contaminants like 1,4-dioxane.
- Common uses
- Moisturizers, Cleansers, Hair conditioners, Body washes
- Environmental note
- Lanolin is a byproduct of wool production, making it a renewable resource. However, the PEG process involves synthetic chemistry, and the ingredient may not be fully biodegradable.
Good to know
- PEG-27 Lanolin is often listed simply as 'PEG-27 Lanolin' on labels; it's not the same as pure lanolin.
- The number '27' refers to the average number of ethylene oxide units added, which determines its water solubility.
Common questions
What is PEG-27 Lanolin in beauty products?
PEG-27 Lanolin is a version of lanolin (a waxy substance from sheep's wool) that has been treated with polyethylene glycol (PEG) to make it mix with water. This means it can be used in water-based products like lotions and cleansers to soften skin and help remove dirt without feeling greasy. However, because it's derived from lanolin, it may still clog pores in some people.
What does PEG-27 Lanolin do in a beauty product?
In a cosmetic product, PEG-27 Lanolin works by reducing surface tension between water and oil, helping to blend ingredients and improve texture. As an emollient, it forms a thin film on the skin that locks in moisture and leaves a smooth feel. As a surfactant, it helps lift dirt and oil from the skin's surface, making it useful in cleansers.
Is PEG-27 Lanolin safe for most people?
PEG-27 Lanolin is generally considered safe for most skin types when used in typical cosmetic concentrations. The main concerns are potential comedogenicity and rare allergic reactions in lanolin-sensitive individuals. Regulatory bodies allow its use with standard purity controls.
Who should be careful with PEG-27 Lanolin?
Individuals with known lanolin allergy or sensitivity Acne-prone skin that clogs easily with waxy 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.