Ingredient review
Laneth-75
INCI: Laneth-75
A gentle, water-soluble lanolin derivative that moisturizes without the heavy, greasy feel of traditional lanolin.
In plain English
Laneth-75 is a modified form of lanolin (the natural oil from sheep's wool) that has been made water-soluble by adding polyethylene glycol (PEG) chains. This means it can mix easily with water-based formulas like lotions and cleansers, providing the moisturizing benefits of lanolin without the sticky, greasy residue. It helps soften and smooth the skin by forming a light, breathable film that locks in moisture.
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
Laneth-75 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 Laneth-75.
- 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
Laneth-75 is a semi-synthetic ingredient created by reacting lanolin with ethylene oxide to produce a water-soluble emollient. It belongs to the PEGylated lanolin family, where the number '75' indicates the average length of the PEG chain, making it highly water-compatible.
How it works
In a cosmetic product, Laneth-75 acts as an emollient and surfactant. It spreads easily over the skin, filling in gaps between skin cells to create a smoother surface. Its water-soluble nature allows it to be rinsed off easily while still leaving a thin, moisturizing film that reduces water loss from the skin (transepidermal water loss, or TEWL).
Pros
Lightweight moisture
Unlike regular lanolin, Laneth-75 is water-soluble, so it hydrates without leaving a heavy, greasy film on the skin.
Gentle for sensitive skin
It has a low irritation risk and is often well-tolerated, making it a good option for those with easily irritated skin.
Cons and cautions
Potential allergen for some
Because it is derived from lanolin, people with wool allergies or lanolin sensitivity may experience redness or itching.
Manufacturing purity concerns
PEG-based ingredients can sometimes contain trace impurities like ethylene oxide or 1,4-dioxane if not properly purified, though reputable brands ensure high-quality processing.
Best for
- People with dry or normal skin looking for a lightweight moisturizer
- Those who find traditional lanolin too heavy or sticky
Use caution if
- Individuals with a known allergy or sensitivity to lanolin or wool alcohols
Usage tips
Safety summary
Laneth-75 is considered safe for most people when used in typical cosmetic concentrations. The main concern is for individuals with lanolin allergies, who should avoid it. Regulatory bodies have reviewed it and found no significant health risks when properly manufactured.
Research notes
Research on PEGylated lanolin derivatives indicates they are effective emollients with low irritation potential. The Cosmetic Ingredient Review (CIR) has assessed similar ingredients and concluded they are safe for use in cosmetics. No major clinical studies specifically on Laneth-75 were found, but its safety profile is well-established through industry use and regulatory review.
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 Cosmetic Ingredient Review (CIR) panel has reviewed PEGylated lanolin derivatives and found them safe for use in concentrations up to 50%.
- Common uses
- Moisturizers, Cleansers, Body washes, Hair conditioners
- Environmental note
- Laneth-75 is derived from lanolin, a byproduct of wool production, which is a renewable resource. However, the PEG processing involves synthetic chemistry, and the ingredient may not be fully biodegradable.
Good to know
- Laneth-75 is often used in rinse-off products like body washes because it cleanses without stripping the skin's natural oils.
- It is considered a safer alternative to traditional lanolin for those who dislike the texture but still want its moisturizing benefits.
Common questions
What is Laneth-75 in beauty products?
Laneth-75 is a modified form of lanolin (the natural oil from sheep's wool) that has been made water-soluble by adding polyethylene glycol (PEG) chains. This means it can mix easily with water-based formulas like lotions and cleansers, providing the moisturizing benefits of lanolin without the sticky, greasy residue. It helps soften and smooth the skin by forming a light, breathable film that locks in moisture.
What does Laneth-75 do in a beauty product?
In a cosmetic product, Laneth-75 acts as an emollient and surfactant. It spreads easily over the skin, filling in gaps between skin cells to create a smoother surface. Its water-soluble nature allows it to be rinsed off easily while still leaving a thin, moisturizing film that reduces water loss from the skin (transepidermal water loss, or TEWL).
Is Laneth-75 safe for most people?
Laneth-75 is considered safe for most people when used in typical cosmetic concentrations. The main concern is for individuals with lanolin allergies, who should avoid it. Regulatory bodies have reviewed it and found no significant health risks when properly manufactured.
Who should be careful with Laneth-75?
Individuals with a known allergy or sensitivity to lanolin or wool alcohols
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.