Ingredient review
PEG-2 Dimeadowfoamamidoethylmonium Methosulfate
INCI: PEG-2 Dimeadowfoamamidoethylmonium Methosulfate
A mild, plant-derived conditioning ingredient that softens hair and reduces static without heavy buildup.
In plain English
This ingredient is a gentle hair softener made from meadowfoam seed oil. It helps detangle hair, reduce frizz, and add shine without leaving a greasy or heavy feeling. Because it's a quaternary ammonium compound (a type of positively charged molecule), it sticks to the negatively charged surface of hair strands, smoothing the cuticle and making hair easier to comb. It's considered very mild and is often used in products for fine or easily weighed-down hair.
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
- semi synthetic
- Evidence
- moderate
- Irritation
- low
- Clogging risk
- low
Quick decision guide
Useful, but context matters
PEG-2 Dimeadowfoamamidoethylmonium Methosulfate 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 PEG-2 Dimeadowfoamamidoethylmonium Methosulfate.
- 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
A semi-synthetic conditioning agent created by reacting meadowfoam seed oil with PEG (polyethylene glycol) and adding a quaternary ammonium group. The result is a positively charged molecule that binds to hair and skin to provide slip, softness, and antistatic properties.
How it works
The positive charge of this ingredient attracts it to the negative charge on damaged or dry hair and skin. Once bound, it forms a thin, lubricating film that reduces friction between strands, making hair easier to detangle and less prone to static. It also helps seal the hair cuticle, which can improve shine and reduce frizz.
Pros
Lightweight conditioning
Provides slip and detangling without leaving hair feeling greasy or heavy, making it ideal for fine hair types.
Plant-derived base
Made from meadowfoam seed oil, a renewable and sustainable source, offering a more natural alternative to purely synthetic conditioners.
Cons and cautions
May not be enough for very dry hair
Its lightweight nature means it might not provide sufficient moisture or repair for severely damaged or coarse hair.
Contains PEGs
PEG compounds can be contaminated with ethylene oxide during manufacturing, though reputable brands use purified grades. Some consumers avoid PEGs for this reason.
Best for
- People with fine or thin hair who want lightweight conditioning
- Anyone looking for a gentle, plant-derived alternative to heavier silicones or conditioners
Use caution if
- Those with very dry, damaged, or coarse hair may need a richer conditioner alongside this ingredient
Usage tips
Safety summary
Considered safe for use in rinse-off and leave-on hair products at typical concentrations. PEG compounds are generally well-tolerated, though some individuals with very sensitive skin may experience mild irritation. No significant toxicity or sensitization concerns have been reported in cosmetic use.
Research notes
Limited direct studies on this specific ingredient, but quaternary ammonium compounds derived from natural oils are well-documented for their conditioning and antistatic properties. Meadowfoam oil itself has been studied for its stability and skin benefits. Overall, evidence supports its safe and effective use in hair care.
Common label clues
- Typical concentration
- 0.5% to 3%
- Regulatory status
- Approved for use in cosmetics in the EU, US, and most major markets. No specific restrictions beyond general cosmetic safety requirements.
- Common uses
- Conditioners, Leave-in treatments, Hair masks, Shampoos, Styling products
- Environmental note
- Meadowfoam is a sustainable crop grown primarily in the Pacific Northwest, requiring minimal pesticides. The PEG component is synthetic and derived from petroleum, though the overall ingredient is considered relatively eco-friendly compared to some alternatives.
Good to know
- Meadowfoam seed oil is known for its stability and high oxidative resistance, which helps this ingredient stay effective in formulas.
- This ingredient is often used in 'low-poo' or sulfate-free shampoos to compensate for reduced cleansing power.
Common questions
What is PEG-2 Dimeadowfoamamidoethylmonium Methosulfate in beauty products?
This ingredient is a gentle hair softener made from meadowfoam seed oil. It helps detangle hair, reduce frizz, and add shine without leaving a greasy or heavy feeling. Because it's a quaternary ammonium compound (a type of positively charged molecule), it sticks to the negatively charged surface of hair strands, smoothing the cuticle and making hair easier to comb. It's considered very mild and is often used in products for fine or easily weighed-down hair.
What does PEG-2 Dimeadowfoamamidoethylmonium Methosulfate do in a beauty product?
The positive charge of this ingredient attracts it to the negative charge on damaged or dry hair and skin. Once bound, it forms a thin, lubricating film that reduces friction between strands, making hair easier to detangle and less prone to static. It also helps seal the hair cuticle, which can improve shine and reduce frizz.
Is PEG-2 Dimeadowfoamamidoethylmonium Methosulfate safe for most people?
Considered safe for use in rinse-off and leave-on hair products at typical concentrations. PEG compounds are generally well-tolerated, though some individuals with very sensitive skin may experience mild irritation. No significant toxicity or sensitization concerns have been reported in cosmetic use.
Who should be careful with PEG-2 Dimeadowfoamamidoethylmonium Methosulfate?
Those with very dry, damaged, or coarse hair may need a richer conditioner alongside this ingredient
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.