Ingredient review
PEG-5 Hydrogenated Lanolin
INCI: PEG-5 Hydrogenated Lanolin
A gentle, modified lanolin that softens skin and helps blend water and oil, but may clog pores in acne-prone individuals.
In plain English
PEG-5 Hydrogenated Lanolin is a processed version of lanolin, the natural oil from sheep's wool. The 'PEG-5' part means it has been treated with ethylene oxide to make it less sticky and more water-friendly, so it spreads easily and helps mix water and oil in products. It works as an emollient, meaning it softens and smooths the skin by filling in gaps between skin cells, and as an emulsifier, helping ingredients that don't normally mix (like oil and water) stay blended. Because it's modified, it's less likely to cause allergic reactions than raw lanolin, but it can still be comedogenic (pore-clogging) for 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-5 Hydrogenated 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-5 Hydrogenated 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
A semi-synthetic ingredient made by reacting hydrogenated lanolin with ethylene oxide, creating a milder, more water-soluble version of natural lanolin.
How it works
It sits on the skin's surface to reduce water loss (like a barrier) and helps other ingredients spread evenly. Its emulsifying properties allow oil and water phases in a formula to stay mixed, improving product texture and stability.
Pros
Lightweight emollience
Provides the softening benefits of lanolin without the heavy, sticky feel, making it comfortable for daily use on dry skin.
Formula stabilizer
Acts as an emulsifier to keep water and oil phases mixed, which improves the texture and shelf life of creams and lotions.
Cons and cautions
Potential pore-clogging
Rates moderate on the comedogenic scale, meaning it can contribute to clogged pores and breakouts for acne-prone individuals.
Processing impurities
The ethoxylation process may create trace amounts of 1,4-dioxane, a potential carcinogen, though reputable manufacturers purify to safe levels.
Best for
- People with dry or normal skin looking for a lightweight emollient
- Anyone using water-in-oil or oil-in-water creams that need a stable texture
Use caution if
- Individuals with very oily or acne-prone skin who notice breakouts from lanolin derivatives
Usage tips
Safety summary
Generally safe for most skin types when used as directed. The main concerns are potential comedogenicity and trace impurities from ethoxylation, but these are well-managed by quality manufacturing. Allergic reactions are rare compared to raw lanolin.
Research notes
Clinical and safety data support its use as a mild emollient and emulsifier. The Cosmetic Ingredient Review (CIR) panel has evaluated PEGylated lanolin derivatives and found them safe for cosmetic use at typical concentrations, with low irritation potential.
Common label clues
- Typical concentration
- 1% to 10%
- Regulatory status
- Approved for use in cosmetics in the US (FDA) and EU (CosIng) with no specific concentration restrictions, though manufacturers must limit 1,4-dioxane impurities to safe levels.
- Common uses
- Moisturizers, Lip balms, Hair conditioners, Makeup removers
- Environmental note
- Lanolin is a byproduct of wool production, making it a renewable resource, but the ethoxylation process involves synthetic chemistry and may have a moderate environmental footprint.
Good to know
- PEG-5 Hydrogenated Lanolin is considered less allergenic than raw lanolin due to the hydrogenation and ethoxylation steps.
- It is often used in 'water-in-oil' emulsions, which are especially moisturizing for very dry skin.
Common questions
What is PEG-5 Hydrogenated Lanolin in beauty products?
PEG-5 Hydrogenated Lanolin is a processed version of lanolin, the natural oil from sheep's wool. The 'PEG-5' part means it has been treated with ethylene oxide to make it less sticky and more water-friendly, so it spreads easily and helps mix water and oil in products. It works as an emollient, meaning it softens and smooths the skin by filling in gaps between skin cells, and as an emulsifier, helping ingredients that don't normally mix (like oil and water) stay blended. Because it's modified, it's less likely to cause allergic reactions than raw lanolin, but it can still be comedogenic (pore-clogging) for some people.
What does PEG-5 Hydrogenated Lanolin do in a beauty product?
It sits on the skin's surface to reduce water loss (like a barrier) and helps other ingredients spread evenly. Its emulsifying properties allow oil and water phases in a formula to stay mixed, improving product texture and stability.
Is PEG-5 Hydrogenated Lanolin safe for most people?
Generally safe for most skin types when used as directed. The main concerns are potential comedogenicity and trace impurities from ethoxylation, but these are well-managed by quality manufacturing. Allergic reactions are rare compared to raw lanolin.
Who should be careful with PEG-5 Hydrogenated Lanolin?
Individuals with very oily or acne-prone skin who notice breakouts from lanolin derivatives
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.