Ingredient review
PEG-150 Lanolin
INCI: PEG-150 Lanolin
A gentle, water-soluble lanolin derivative that helps cleanse and condition without the heavy feel of traditional lanolin.
In plain English
PEG-150 Lanolin is a modified version of lanolin (a natural oil from sheep's wool) that has been treated with ethylene oxide to make it dissolve in water. This means it can be used in rinse-off products like shampoos and body washes to help clean and soften skin and hair without leaving a greasy residue. It also helps mix oil and water ingredients together in a formula.
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-150 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-150 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
PEG-150 Lanolin is a semi-synthetic ingredient created by reacting lanolin with 150 units of ethylene oxide. This process makes the naturally waxy lanolin water-soluble and more compatible with modern cosmetic formulations.
How it works
In a cosmetic product, PEG-150 Lanolin acts as a surfactant (cleaning agent) and emulsifier (helps oil and water mix). It reduces surface tension so dirt and oil can be rinsed away, while also depositing a thin, moisturizing film on skin or hair to improve softness and manageability.
Pros
Gentle cleanser
PEG-150 Lanolin cleanses effectively but is much milder than traditional sulfates, making it a good choice for sensitive or dry skin.
Conditioning feel
It leaves a soft, smooth feel on skin and hair without the greasy or waxy sensation of plain lanolin.
Cons and cautions
Ethoxylation concerns
As an ethoxylated ingredient, it may contain trace amounts of 1,4-dioxane, a potential contaminant. Reputable manufacturers purify to safe levels, but some consumers prefer to avoid ethoxylated ingredients entirely.
Not fully natural
Despite being derived from natural lanolin, the chemical modification means it is not considered a natural ingredient, which may matter to some users.
Best for
- People with dry or sensitive skin looking for a gentle cleanser
- Anyone wanting a conditioning shampoo or body wash that doesn't leave a heavy residue
Use caution if
- Individuals with known wool allergies (though the modification reduces allergenic potential, caution is still advised)
Usage tips
Safety summary
PEG-150 Lanolin is generally recognized as safe for cosmetic use. The main concern is potential contamination with 1,4-dioxane, but modern manufacturing and purification keep levels well below safety limits. It has low irritation and comedogenic potential.
Research notes
The Cosmetic Ingredient Review (CIR) panel has evaluated PEG-150 Lanolin and similar ethoxylated lanolin derivatives, concluding they are safe for use in cosmetics at concentrations up to 5%. No significant human or animal toxicity has been reported.
Common label clues
- Typical concentration
- 0.5% to 5%
- Regulatory status
- Approved for use in cosmetics in the US, EU, and many other regions. The CIR panel has reviewed it and found it safe at typical use concentrations.
- Common uses
- Cleansers, Shampoos, Body washes, Conditioners, Lotions
- Environmental note
- Lanolin is a byproduct of wool production, making it a renewable resource. However, the ethoxylation process involves synthetic chemistry and energy use.
Good to know
- PEG-150 Lanolin is considered safe by the Cosmetic Ingredient Review (CIR) panel when used as directed.
- The '150' refers to the average number of ethylene oxide units added, which determines its water solubility and mildness.
Common questions
What is PEG-150 Lanolin in beauty products?
PEG-150 Lanolin is a modified version of lanolin (a natural oil from sheep's wool) that has been treated with ethylene oxide to make it dissolve in water. This means it can be used in rinse-off products like shampoos and body washes to help clean and soften skin and hair without leaving a greasy residue. It also helps mix oil and water ingredients together in a formula.
What does PEG-150 Lanolin do in a beauty product?
In a cosmetic product, PEG-150 Lanolin acts as a surfactant (cleaning agent) and emulsifier (helps oil and water mix). It reduces surface tension so dirt and oil can be rinsed away, while also depositing a thin, moisturizing film on skin or hair to improve softness and manageability.
Is PEG-150 Lanolin safe for most people?
PEG-150 Lanolin is generally recognized as safe for cosmetic use. The main concern is potential contamination with 1,4-dioxane, but modern manufacturing and purification keep levels well below safety limits. It has low irritation and comedogenic potential.
Who should be careful with PEG-150 Lanolin?
Individuals with known wool allergies (though the modification reduces allergenic potential, caution is still advised)
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.