Ingredient review
Laneth-15
INCI: LANETH-15
Laneth-15 is a gentle emulsifier derived from lanolin, but it may be comedogenic for acne-prone skin and is not suitable for those with lanolin allergies.
In plain English
Laneth-15 is a modified version of lanolin, a natural oil from sheep's wool. It helps mix water and oil in creams and lotions, making them smooth and stable. It also softens skin. However, because it comes from lanolin, it can clog pores for some people and may cause allergic reactions in those sensitive to wool-derived ingredients.
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
Laneth-15 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 Laneth-15.
- 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
Laneth-15 is a semi-synthetic ingredient created by reacting lanolin (a waxy substance from sheep's wool) with ethylene oxide (PEG). This process makes the lanolin water-soluble, allowing it to act as an emulsifier that blends oil and water phases in cosmetic formulas.
How it works
In a cosmetic product, Laneth-15 sits at the boundary between oil and water droplets, reducing surface tension so they mix into a stable emulsion. This prevents creams and lotions from separating. It also deposits a thin, moisturizing film on the skin, helping to soften and condition.
Pros
Effective emulsifier
Laneth-15 helps oil and water mix smoothly, giving creams and lotions a stable, uniform texture that doesn't separate over time.
Mild skin conditioning
It leaves a light, moisturizing film on the skin, which can help soften and smooth dry areas without feeling greasy.
Cons and cautions
Potential pore clogging
Because it is derived from lanolin, Laneth-15 has a moderate comedogenic rating, meaning it may cause breakouts or clogged pores for acne-prone individuals.
Allergen risk
People with lanolin or wool allergies may experience contact dermatitis or irritation when using products containing Laneth-15.
Best for
- People with dry or normal skin looking for a stable, moisturizing cream
- Those who tolerate lanolin-based ingredients well
Use caution if
- Individuals with known lanolin or wool allergies
- Acne-prone or oily skin types concerned about pore clogging
Usage tips
Safety summary
Laneth-15 is considered safe for most people at typical cosmetic concentrations. The main risks are allergic reactions in those with lanolin sensitivity and potential comedogenicity. Regulatory bodies like the CIR have deemed it safe when formulated properly.
Research notes
Research on Laneth-15 is limited, but it is part of a broader class of PEGylated lanolin derivatives that have been reviewed by the Cosmetic Ingredient Review panel. Studies indicate low acute toxicity and low skin irritation potential, though comedogenicity data is mixed and depends on concentration and formulation.
Common label clues
- Typical concentration
- 0.5% to 5% in leave-on products; up to 10% in rinse-off products
- Regulatory status
- Approved for use in cosmetics in the EU, US, and many other regions. The Cosmetic Ingredient Review (CIR) panel has reviewed PEGylated lanolin derivatives and found them safe at typical use concentrations.
- Common uses
- Moisturizers, Cleansers, Makeup removers, Hair conditioners
- Environmental note
- Laneth-15 is semi-synthetic and not readily biodegradable. Its production involves ethylene oxide, which has environmental concerns, but the ingredient itself is used in low concentrations.
Good to know
- Laneth-15 is often used in combination with other emulsifiers to improve stability and texture.
- The '15' refers to the average number of ethylene oxide units added, which determines its water solubility.
Common questions
What is Laneth-15 in beauty products?
Laneth-15 is a modified version of lanolin, a natural oil from sheep's wool. It helps mix water and oil in creams and lotions, making them smooth and stable. It also softens skin. However, because it comes from lanolin, it can clog pores for some people and may cause allergic reactions in those sensitive to wool-derived ingredients.
What does Laneth-15 do in a beauty product?
In a cosmetic product, Laneth-15 sits at the boundary between oil and water droplets, reducing surface tension so they mix into a stable emulsion. This prevents creams and lotions from separating. It also deposits a thin, moisturizing film on the skin, helping to soften and condition.
Is Laneth-15 safe for most people?
Laneth-15 is considered safe for most people at typical cosmetic concentrations. The main risks are allergic reactions in those with lanolin sensitivity and potential comedogenicity. Regulatory bodies like the CIR have deemed it safe when formulated properly.
Who should be careful with Laneth-15?
Individuals with known lanolin or wool allergies Acne-prone or oily skin types concerned about pore clogging
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.