Ingredient review
PEG-3 Cocamide DEA
INCI: PEG-3 Cocamide DEA
An effective foaming agent, but may cause irritation for sensitive skin and has raised environmental concerns.
In plain English
PEG-3 Cocamide DEA is a synthetic ingredient that helps create a rich, foamy lather in cleansers and shampoos. It is made by reacting coconut oil derivatives with ethylene oxide and diethanolamine. While it works well to boost foam and thicken formulas, it can be drying or irritating for some people, especially those with sensitive or compromised skin. There are also environmental and safety debates around ingredients in this family, leading many brands to use gentler alternatives.
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
PEG-3 Cocamide 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 PEG-3 Cocamide 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
A synthetic surfactant derived from coconut oil fatty acids, ethylene oxide, and diethanolamine. It belongs to the cocamide DEA family, which are common foam boosters in personal care products.
How it works
It reduces the surface tension between water and oil, allowing dirt and oil to be rinsed away. It also stabilizes foam and increases the viscosity (thickness) of liquid cleansers, making them feel richer and more luxurious.
Pros
Excellent foam booster
Creates a dense, creamy lather that many people associate with effective cleansing.
Improves product texture
Helps thicken liquid cleansers so they feel more substantial and luxurious during use.
Cons and cautions
Can irritate sensitive skin
May cause dryness, redness, or stinging for those with compromised skin barriers or conditions like eczema.
Environmental and safety concerns
Cocamide DEA ingredients have been flagged for potential aquatic toxicity and may contain trace 1,4-dioxane, a possible carcinogen, though levels are typically low in well-manufactured products.
Best for
- People with normal to oily skin who enjoy a foamy cleanser
- Those using rinse-off products and not prone to irritation
Use caution if
- Individuals with sensitive, dry, or eczema-prone skin
- Anyone seeking a more natural or eco-friendly routine
Usage tips
Safety summary
Generally considered safe for rinse-off use at low concentrations, but may cause irritation for sensitive individuals. Trace impurities like 1,4-dioxane are a concern, though levels are typically low in quality products. The ingredient has been reviewed by the Cosmetic Ingredient Review (CIR) panel, which deemed it safe under current usage practices.
Research notes
Studies indicate that cocamide DEA can cause mild to moderate skin irritation in some individuals, especially with prolonged exposure. The CIR panel concluded it is safe for rinse-off products at concentrations up to 10%. Environmental data show low biodegradability, prompting some brands to phase it out.
Common label clues
- Typical concentration
- 1–5% in rinse-off products
- Regulatory status
- Approved for use in cosmetics in the US and EU, but the EU restricts cocamide DEA in leave-on products at concentrations above 0.5% due to skin sensitization potential. Always check local regulations.
- Common uses
- Shampoos, Body washes, Facial cleansers, Bubble baths
- Environmental note
- Cocamide DEA ingredients are not readily biodegradable and may accumulate in aquatic environments, raising concerns for eco-conscious consumers.
Good to know
- PEG-3 Cocamide DEA is part of a broader class of ethoxylated ingredients that can contain trace 1,4-dioxane, but reputable manufacturers purify to minimize this.
- Some regions, like the EU, have restricted cocamide DEA in certain leave-on products due to irritation concerns, but it remains common in rinse-off cleansers.
Common questions
What is PEG-3 Cocamide DEA in beauty products?
PEG-3 Cocamide DEA is a synthetic ingredient that helps create a rich, foamy lather in cleansers and shampoos. It is made by reacting coconut oil derivatives with ethylene oxide and diethanolamine. While it works well to boost foam and thicken formulas, it can be drying or irritating for some people, especially those with sensitive or compromised skin. There are also environmental and safety debates around ingredients in this family, leading many brands to use gentler alternatives.
What does PEG-3 Cocamide DEA do in a beauty product?
It reduces the surface tension between water and oil, allowing dirt and oil to be rinsed away. It also stabilizes foam and increases the viscosity (thickness) of liquid cleansers, making them feel richer and more luxurious.
Is PEG-3 Cocamide DEA safe for most people?
Generally considered safe for rinse-off use at low concentrations, but may cause irritation for sensitive individuals. Trace impurities like 1,4-dioxane are a concern, though levels are typically low in quality products. The ingredient has been reviewed by the Cosmetic Ingredient Review (CIR) panel, which deemed it safe under current usage practices.
Who should be careful with PEG-3 Cocamide DEA?
Individuals with sensitive, dry, or eczema-prone skin Anyone seeking a more natural or eco-friendly routine
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.