Ingredient review
PEG-70 Lanolin
INCI: PEG-70 Lanolin
PEG-70 Lanolin is a modified lanolin that adds water-loving properties, making it a gentle emulsifier and skin softener, but it may raise concerns about ethoxylation byproducts.
In plain English
PEG-70 Lanolin is a version of lanolin (a natural wax from sheep's wool) that has been chemically modified with ethylene oxide to make it dissolve in water. This allows it to help blend oil and water in products like lotions and cleansers, while still providing the moisturizing feel of lanolin. The 'PEG' part means it's been processed to be less greasy and more compatible with water-based formulas.
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-70 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-70 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-70 Lanolin is a semi-synthetic ingredient created by reacting lanolin with 70 units of ethylene oxide per molecule. This process, called ethoxylation, turns the waxy, water-repellent lanolin into a water-soluble, mild emulsifier and skin conditioner.
How it works
In a cosmetic product, PEG-70 Lanolin acts as an emulsifier, helping to stabilize mixtures of oil and water so they don't separate. It also deposits a thin, moisturizing film on the skin or hair, reducing water loss and leaving a smooth feel without the heavy greasiness of plain lanolin.
Pros
Water-soluble lanolin
Unlike plain lanolin, PEG-70 Lanolin dissolves in water, making it easy to rinse off and less likely to clog pores or feel greasy.
Gentle skin feel
It leaves a soft, smooth film on skin without the heavy tackiness of traditional lanolin, improving the sensory experience of creams and lotions.
Cons and cautions
Ethoxylation concerns
The manufacturing process can produce trace amounts of 1,4-dioxane, a potential contaminant. Reputable brands purify the ingredient to minimize this risk.
Not for lanolin-sensitive skin
If you have a known allergy to lanolin or wool alcohols, this modified version may still trigger a reaction, so patch testing is recommended.
Best for
- People with normal to dry skin looking for a mild emulsifier in moisturizers
- Those who want a water-soluble lanolin alternative for hair conditioners
Use caution if
- Individuals with known lanolin allergy or sensitivity to wool-derived ingredients
- Those seeking completely natural or non-ethoxylated ingredients
Usage tips
Safety summary
PEG-70 Lanolin is generally safe for most people when used in properly formulated cosmetics. The main concern is potential contamination with 1,4-dioxane, but reputable manufacturers purify the ingredient to safe levels. It is not recommended for those with lanolin allergies.
Research notes
The Cosmetic Ingredient Review (CIR) panel has evaluated PEG lanolin derivatives and found them safe for use in cosmetics at concentrations up to 5%. Studies indicate low irritation and sensitization potential, though individual reactions can occur in lanolin-sensitive individuals.
Common label clues
- Typical concentration
- 0.5% to 5%
- Regulatory status
- Approved for use in cosmetics in the US, EU, and many other regions, with typical concentrations up to 5% considered safe by expert panels.
- Common uses
- Cleansers, Moisturizers, Hair conditioners
- 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-70 Lanolin is considered safe by the Cosmetic Ingredient Review panel at typical use levels.
- The number '70' refers to the average moles of ethylene oxide added, which determines its water solubility and mildness.
Common questions
What is PEG-70 Lanolin in beauty products?
PEG-70 Lanolin is a version of lanolin (a natural wax from sheep's wool) that has been chemically modified with ethylene oxide to make it dissolve in water. This allows it to help blend oil and water in products like lotions and cleansers, while still providing the moisturizing feel of lanolin. The 'PEG' part means it's been processed to be less greasy and more compatible with water-based formulas.
What does PEG-70 Lanolin do in a beauty product?
In a cosmetic product, PEG-70 Lanolin acts as an emulsifier, helping to stabilize mixtures of oil and water so they don't separate. It also deposits a thin, moisturizing film on the skin or hair, reducing water loss and leaving a smooth feel without the heavy greasiness of plain lanolin.
Is PEG-70 Lanolin safe for most people?
PEG-70 Lanolin is generally safe for most people when used in properly formulated cosmetics. The main concern is potential contamination with 1,4-dioxane, but reputable manufacturers purify the ingredient to safe levels. It is not recommended for those with lanolin allergies.
Who should be careful with PEG-70 Lanolin?
Individuals with known lanolin allergy or sensitivity to wool-derived ingredients 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.