Ingredient review
Poloxamer 238
INCI: Poloxamer 238
A mild synthetic emulsifier that helps mix oil and water, making cleansers and lotions feel smooth without stripping the skin.
In plain English
Poloxamer 238 is a man-made ingredient that helps oil and water blend together in skincare products. It is often used in cleansers and lotions to create a smooth, even texture and to help rinse away dirt without leaving a greasy film. Because it is very gentle, it is a popular choice for sensitive skin 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
- synthetic
- Evidence
- moderate
- Irritation
- low
- Clogging risk
- low
Quick decision guide
Useful, but context matters
Poloxamer 238 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 Poloxamer 238.
- 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
Poloxamer 238 is a nonionic block copolymer surfactant made from ethylene oxide and propylene oxide. It belongs to the poloxamer family, known for their ability to reduce surface tension and stabilize emulsions.
How it works
In a cosmetic product, Poloxamer 238 works by surrounding oil droplets and helping them disperse evenly in water. This creates a stable, creamy texture in cleansers and lotions. It also helps dissolve other ingredients that normally don't mix well with water, improving the overall feel and performance of the product.
Pros
Mild and non-irritating
Poloxamer 238 is known for its low irritation potential, making it suitable for sensitive skin and daily use without disrupting the skin barrier.
Versatile formula stabilizer
It helps create smooth, stable emulsions in cleansers and lotions, improving product texture and shelf life.
Cons and cautions
Synthetic ingredient
Poloxamer 238 is man-made, which may be a drawback for consumers who prefer natural or plant-derived ingredients.
Can feel tacky at high levels
In high concentrations, it may leave a slightly sticky or tacky feel on the skin, which some users find unpleasant.
Best for
- People with sensitive or reactive skin
- Anyone using gentle, non-stripping cleansers
Use caution if
- Those seeking 100% natural or organic-only products
Usage tips
Safety summary
Poloxamer 238 is considered safe for cosmetic use with low irritation and sensitization potential. It has been reviewed by the Cosmetic Ingredient Review (CIR) panel and is widely used in personal care products.
Research notes
Studies confirm that poloxamers are mild surfactants with low acute toxicity. They are well-tolerated on skin and eyes at typical cosmetic concentrations. Research continues on their environmental fate.
Common label clues
- Typical concentration
- 0.5% to 5%
- Regulatory status
- Approved for use in cosmetics in the EU, US, and many other regions. Generally recognized as safe at typical use levels.
- Common uses
- Cleansers, Shampoos, Body washes, Lotions, Serums
- Environmental note
- Poloxamers are synthetic and not readily biodegradable in all environments, though some studies show partial degradation in wastewater treatment.
Good to know
- Poloxamers are also used in medical and pharmaceutical applications due to their safety profile
- They are biodegradable under certain conditions, though not from natural sources
Common questions
What is Poloxamer 238 in beauty products?
Poloxamer 238 is a man-made ingredient that helps oil and water blend together in skincare products. It is often used in cleansers and lotions to create a smooth, even texture and to help rinse away dirt without leaving a greasy film. Because it is very gentle, it is a popular choice for sensitive skin formulas.
What does Poloxamer 238 do in a beauty product?
In a cosmetic product, Poloxamer 238 works by surrounding oil droplets and helping them disperse evenly in water. This creates a stable, creamy texture in cleansers and lotions. It also helps dissolve other ingredients that normally don't mix well with water, improving the overall feel and performance of the product.
Is Poloxamer 238 safe for most people?
Poloxamer 238 is considered safe for cosmetic use with low irritation and sensitization potential. It has been reviewed by the Cosmetic Ingredient Review (CIR) panel and is widely used in personal care products.
Who should be careful with Poloxamer 238?
Those seeking 100% natural or organic-only products
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.