Ingredient review
Poloxamer 231
INCI: Poloxamer 231
Poloxamer 231 is a gentle synthetic emulsifier that helps blend oil and water in cleansers and lotions, with a low irritation profile.
In plain English
Poloxamer 231 is a man-made ingredient that helps oil and water mix together in products like cleansers and lotions. It's part of a family of ingredients called poloxamers, which are known for being gentle on skin while still doing a good job of cleaning or stabilizing formulas. Think of it as a helper that keeps your product smooth and prevents it from separating.
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 231 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 231.
- 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 231 is a synthetic block copolymer made from ethylene oxide and propylene oxide. It belongs to the poloxamer family, which are nonionic surfactants widely used in cosmetics and personal care products for their emulsifying, cleansing, and solubilizing properties.
How it works
In a cosmetic product, Poloxamer 231 works by reducing the surface tension between oil and water, allowing them to form a stable mixture (emulsion). It also helps dissolve ingredients that don't normally mix well with water, and it can boost the foaming or cleansing action of a formula without being harsh on the skin.
Pros
Gentle on skin
Poloxamer 231 is known for low irritation, making it suitable for daily use in cleansers and body washes without stripping natural oils.
Effective stabilizer
It helps keep oil and water mixed in lotions and creams, preventing separation and ensuring a consistent product texture.
Cons and cautions
Synthetic origin
As a man-made ingredient, it may not appeal to consumers seeking natural or plant-based formulations.
Potential tackiness at high levels
In high concentrations, Poloxamer 231 can leave a slightly sticky or tacky feel on the skin, which may be noticeable in leave-on products.
Best for
- People with normal to combination skin looking for gentle cleansers
- Anyone using lotions or creams that need stable texture
Use caution if
- Those strictly avoiding all synthetic ingredients
- Individuals with known sensitivity to poloxamers (rare)
Usage tips
Safety summary
Poloxamer 231 is considered safe for cosmetic use at typical concentrations. It has a low irritation and comedogenic risk, making it suitable for most skin types. Rare allergic reactions are possible but uncommon.
Research notes
Poloxamers have been studied for their low toxicity and mildness in skin applications. Research supports their use as safe emulsifiers and surfactants in personal care products, with no significant safety concerns at standard usage levels.
Common label clues
- Typical concentration
- 0.5% to 5%
- Regulatory status
- Approved for use in cosmetics in the US and EU under general safety guidelines. No specific restrictions beyond standard cosmetic ingredient safety.
- Common uses
- Cleansers, Shampoos, Body washes, Emulsions
- Environmental note
- Poloxamers are synthetic and not biodegradable in all conditions, but they are used in low concentrations and are generally considered low-risk for aquatic environments.
Good to know
- Poloxamer 231 is part of a larger family of poloxamers, each with different properties based on their molecular weight and ratio of ethylene oxide to propylene oxide.
- It is often used in combination with other emulsifiers to fine-tune product feel.
Common questions
What is Poloxamer 231 in beauty products?
Poloxamer 231 is a man-made ingredient that helps oil and water mix together in products like cleansers and lotions. It's part of a family of ingredients called poloxamers, which are known for being gentle on skin while still doing a good job of cleaning or stabilizing formulas. Think of it as a helper that keeps your product smooth and prevents it from separating.
What does Poloxamer 231 do in a beauty product?
In a cosmetic product, Poloxamer 231 works by reducing the surface tension between oil and water, allowing them to form a stable mixture (emulsion). It also helps dissolve ingredients that don't normally mix well with water, and it can boost the foaming or cleansing action of a formula without being harsh on the skin.
Is Poloxamer 231 safe for most people?
Poloxamer 231 is considered safe for cosmetic use at typical concentrations. It has a low irritation and comedogenic risk, making it suitable for most skin types. Rare allergic reactions are possible but uncommon.
Who should be careful with Poloxamer 231?
Those strictly avoiding all synthetic ingredients Individuals with known sensitivity to poloxamers (rare)
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.