Ingredient review
PEI-14 PEG-24/PPG-16 Copolymer
INCI: PEI-14 PEG-24/PPG-16 Copolymer
A synthetic polymer that helps products spread smoothly and leaves a light, flexible film on skin or hair for a conditioned feel.
In plain English
This is a man-made ingredient that forms a thin, flexible film on your skin or hair. It helps other ingredients spread evenly and can make hair feel softer and more manageable without being heavy or sticky. Think of it like a very light, invisible glove that holds everything in place.
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
PEI-14 PEG-24/PPG-16 Copolymer 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 PEI-14 PEG-24/PPG-16 Copolymer.
- 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 synthetic copolymer made from polyethyleneimine (PEI) modified with polyethylene glycol (PEG) and polypropylene glycol (PPG) chains. It is designed to be water-soluble and film-forming.
How it works
When applied, the copolymer molecules link together to create a thin, flexible film on the surface of skin or hair. This film helps lock in moisture, smooth the cuticle, and improve the feel of the product. It also helps other ingredients spread more evenly.
Pros
Lightweight feel
Leaves a flexible film that doesn't weigh down hair or feel greasy on skin, making it ideal for fine hair or oily skin types.
Improves product texture
Helps creams and serums glide on smoothly and evenly, enhancing the user experience without a tacky residue.
Cons and cautions
Synthetic origin
Derived from petrochemicals, which may be a concern for those seeking natural or biodegradable ingredients.
Potential PEG impurities
If not highly purified, PEG compounds can contain trace levels of ethylene oxide or 1,4-dioxane, though cosmetic-grade ingredients are typically well-refined.
Best for
- People looking for lightweight conditioning in hair products
- Those who want a smooth, even application from their serums or lotions
Use caution if
- Individuals who strictly avoid synthetic or PEG-based ingredients
- Those with known sensitivities to PEG compounds (rare)
Usage tips
Safety summary
Generally recognized as safe for topical use at typical concentrations. The main concern is theoretical contamination from PEG processing, but cosmetic-grade ingredients are highly purified. No significant irritation or sensitization has been reported in standard tests.
Research notes
Limited independent studies specifically on this copolymer, but it is structurally similar to other PEG/PPG copolymers that have been reviewed by the Cosmetic Ingredient Review panel and found safe. Most evidence comes from manufacturer safety data and formulation studies.
Common label clues
- Typical concentration
- 0.1% to 2%
- Regulatory status
- Approved for use in cosmetics in the EU, US, and other major markets. The Cosmetic Ingredient Review (CIR) panel has evaluated similar PEG copolymers and found them safe as used.
- Common uses
- Hair conditioners, Styling products, Leave-in treatments, Skincare serums
- Environmental note
- As a synthetic polymer, it is not readily biodegradable. However, its low use concentration means environmental impact is minimal compared to larger-scale industrial polymers.
Good to know
- This ingredient is often found in combination with other conditioning polymers for a synergistic effect.
- It is considered safe at typical use levels by major cosmetic safety panels.
Common questions
What is PEI-14 PEG-24/PPG-16 Copolymer in beauty products?
This is a man-made ingredient that forms a thin, flexible film on your skin or hair. It helps other ingredients spread evenly and can make hair feel softer and more manageable without being heavy or sticky. Think of it like a very light, invisible glove that holds everything in place.
What does PEI-14 PEG-24/PPG-16 Copolymer do in a beauty product?
When applied, the copolymer molecules link together to create a thin, flexible film on the surface of skin or hair. This film helps lock in moisture, smooth the cuticle, and improve the feel of the product. It also helps other ingredients spread more evenly.
Is PEI-14 PEG-24/PPG-16 Copolymer safe for most people?
Generally recognized as safe for topical use at typical concentrations. The main concern is theoretical contamination from PEG processing, but cosmetic-grade ingredients are highly purified. No significant irritation or sensitization has been reported in standard tests.
Who should be careful with PEI-14 PEG-24/PPG-16 Copolymer?
Individuals who strictly avoid synthetic or PEG-based ingredients Those with known sensitivities to PEG compounds (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.