Ingredient review
Linoleamide DEA
INCI: LINOLEAMIDE DEA
Linoleamide DEA is a synthetic foam booster and thickener that can improve the lather of cleansers, but it may cause mild irritation for sensitive skin and has raised some safety concerns due to its DEA content.
In plain English
Linoleamide DEA is a man-made ingredient added to cleansers like shampoos and body washes to make them thicker and produce a richer, creamier lather. It's a type of surfactant, which means it helps water mix with oil and dirt so they can be rinsed away. The 'DEA' part stands for diethanolamine, a compound that has been studied for potential irritation and contamination risks. While generally considered safe in rinse-off products at low levels, some people prefer to avoid it due to these concerns.
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 moderate; clogging risk is low.
- Source
- synthetic
- Evidence
- moderate
- Irritation
- moderate
- Clogging risk
- low
Quick decision guide
Useful, but context matters
Linoleamide DEA can be useful, but watch for some irritation potential.
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 Linoleamide DEA.
- 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
moderateCan bother some users, especially with frequent use, damaged skin, or strong companion ingredients.
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
Linoleamide DEA is a synthetic compound created by reacting linoleic acid (a fatty acid from vegetable oils) with diethanolamine (DEA). It belongs to a class of ingredients called alkanolamides, which are used primarily as foam boosters and thickeners in cleansing products.
How it works
In a cosmetic product, Linoleamide DEA works by increasing the viscosity (thickness) of the formula and stabilizing foam. It helps create a dense, luxurious lather that feels pleasant on the skin and hair. As a surfactant, it also helps lift dirt and oil from the surface so they can be washed away with water.
Pros
Improves lather quality
Creates a dense, stable foam that many users find satisfying and effective for cleansing.
Thickens formulas naturally
Increases the viscosity of liquid cleansers without needing additional synthetic thickeners, giving a pleasant texture.
Cons and cautions
May irritate sensitive skin
Can cause stinging, redness, or dryness in people with compromised skin barriers or conditions like eczema.
DEA safety concerns
DEA compounds can react with nitrites (common contaminants) to form nitrosamines, which are potential carcinogens. While levels are regulated, some consumers prefer to avoid them.
Best for
- People who enjoy rich, creamy lather in their cleansers
- Those with normal to oily skin looking for effective cleansing
Use caution if
- Individuals with sensitive, reactive, or eczema-prone skin
- Anyone seeking to minimize exposure to DEA-based ingredients
Usage tips
Safety summary
Linoleamide DEA is considered safe for most people when used in rinse-off products at typical concentrations. However, it can cause mild irritation in sensitive individuals, and the DEA component has raised concerns about potential nitrosamine contamination. Regulatory bodies have set safety limits to mitigate this risk.
Research notes
Studies show that DEA compounds can cause skin irritation at high concentrations and may form nitrosamines under certain conditions. The CIR panel reviewed data and concluded that DEA ingredients are safe in rinse-off products up to 5%. More recent research focuses on alternatives with lower irritation potential.
Common label clues
- Typical concentration
- 1% to 5%
- Regulatory status
- Approved for use in cosmetics in the US and EU, with concentration limits in rinse-off products. The EU restricts DEA compounds to a maximum of 5% and requires purity standards to minimize nitrosamine formation.
- Common uses
- Shampoos, Body washes, Facial cleansers, Liquid soaps
- Environmental note
- Linoleamide DEA is not readily biodegradable and may accumulate in aquatic environments. Its production involves synthetic chemistry, which has a moderate environmental footprint.
Good to know
- Linoleamide DEA is often found in products labeled as 'sulfate-free' as a milder alternative to sodium lauryl sulfate.
- The Cosmetic Ingredient Review (CIR) panel has deemed DEA compounds safe in rinse-off products at concentrations up to 5%.
Common questions
What is Linoleamide DEA in beauty products?
Linoleamide DEA is a man-made ingredient added to cleansers like shampoos and body washes to make them thicker and produce a richer, creamier lather. It's a type of surfactant, which means it helps water mix with oil and dirt so they can be rinsed away. The 'DEA' part stands for diethanolamine, a compound that has been studied for potential irritation and contamination risks. While generally considered safe in rinse-off products at low levels, some people prefer to avoid it due to these concerns.
What does Linoleamide DEA do in a beauty product?
In a cosmetic product, Linoleamide DEA works by increasing the viscosity (thickness) of the formula and stabilizing foam. It helps create a dense, luxurious lather that feels pleasant on the skin and hair. As a surfactant, it also helps lift dirt and oil from the surface so they can be washed away with water.
Is Linoleamide DEA safe for most people?
Linoleamide DEA is considered safe for most people when used in rinse-off products at typical concentrations. However, it can cause mild irritation in sensitive individuals, and the DEA component has raised concerns about potential nitrosamine contamination. Regulatory bodies have set safety limits to mitigate this risk.
Who should be careful with Linoleamide DEA?
Individuals with sensitive, reactive, or eczema-prone skin Anyone seeking to minimize exposure to DEA-based 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.