Ingredient review

PEG/PPG-23/17 Copolymer

INCI: PEG/PPG-23/17 COPOLYMER

A safe, synthetic thickener that improves product texture and spreadability, but offers no direct skin benefit.

beautyskincarethickener

In plain English

PEG/PPG-23/17 Copolymer is a man-made ingredient that helps give skincare products a smooth, silky feel. It thickens formulas so they spread easily and can also help other ingredients stay on your skin longer. It doesn't actively treat or improve your skin, but it makes the product nicer to use.

Review score

Safety, usefulness, and evidence

3.8Good
3.8/ 5

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
How reviews are scored

Quick decision guide

Useful, but context matters

PEG/PPG-23/17 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.

  1. Step 1Start with the score, then check the irritation and clogging risk before judging PEG/PPG-23/17 Copolymer.
  2. Step 2Use the "Best for" and "Use caution if" sections to match the ingredient to your skin, not just to a marketing claim.
  3. 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

low

Less likely to sting, burn, or bother most users, though sensitive skin can still react.

Clogging risk

low

Less likely to feel heavy or contribute to clogged pores for most skin types.

Evidence level

moderate

There is useful support, but formula details and claim strength still matter.

What it is

A synthetic polymer made from repeating units of ethylene glycol (PEG) and propylene glycol (PPG). The numbers 23 and 17 refer to the average number of repeating units in each block, which determines its properties.

How it works

It acts as a thickener by increasing the viscosity of a formula, and as an emulsifier by helping oil and water mix. As a film former, it leaves a thin, flexible layer on the skin that can lock in moisture or help sunscreen ingredients stay in place.

Pros

Improves texture

Creates a silky, smooth feel that makes products more pleasant to apply and helps them spread evenly.

Stabilizes formulas

Helps keep oil and water mixed, preventing separation and ensuring consistent performance from first use to last.

Cons and cautions

No active benefit

It doesn't hydrate, exfoliate, or treat skin concerns—it's purely a texture and stability helper.

Synthetic origin

Made from petrochemicals, which may be a concern for those seeking natural or eco-friendly ingredients.

Best for

  • Anyone who wants a smooth, elegant-feeling moisturizer or serum
  • People looking for a lightweight, non-greasy sunscreen texture

Use caution if

  • Those who strictly avoid synthetic or PEG-based ingredients

Usage tips

Use products containing this ingredient as directed—it's already formulated at the right level for texture and stability.
If you have sensitive skin, patch test a new product first, though irritation is rare.

Safety summary

PEG/PPG-23/17 Copolymer is considered safe for use in cosmetics. It has low irritation and comedogenic potential. Some consumers avoid PEG compounds due to concerns about potential contamination with ethylene oxide or 1,4-dioxane during manufacturing, but cosmetic-grade ingredients are purified to meet safety standards.

Research notes

Safety assessments by the Cosmetic Ingredient Review (CIR) panel have concluded that PEG/PPG copolymers are safe in cosmetics when formulated properly. No significant skin irritation or sensitization has been reported in studies.

Common label clues

Typical concentration
0.5% to 5%
Regulatory status
Approved for use in cosmetics in the US (FDA), EU (CosIng), and many other regions. Generally recognized as safe at typical use levels.
Common uses
Serums, Moisturizers, Sunscreens, Hair products
Environmental note
As a synthetic polymer, it is not biodegradable. However, it is used in low concentrations and is not known to accumulate in the environment.

Good to know

  • PEG/PPG copolymers are considered safe by major regulatory bodies when used in cosmetics.
  • The numbers (23/17) indicate the polymer's molecular structure, not its concentration.

Common questions

What is PEG/PPG-23/17 Copolymer in beauty products?

PEG/PPG-23/17 Copolymer is a man-made ingredient that helps give skincare products a smooth, silky feel. It thickens formulas so they spread easily and can also help other ingredients stay on your skin longer. It doesn't actively treat or improve your skin, but it makes the product nicer to use.

What does PEG/PPG-23/17 Copolymer do in a beauty product?

It acts as a thickener by increasing the viscosity of a formula, and as an emulsifier by helping oil and water mix. As a film former, it leaves a thin, flexible layer on the skin that can lock in moisture or help sunscreen ingredients stay in place.

Is PEG/PPG-23/17 Copolymer safe for most people?

PEG/PPG-23/17 Copolymer is considered safe for use in cosmetics. It has low irritation and comedogenic potential. Some consumers avoid PEG compounds due to concerns about potential contamination with ethylene oxide or 1,4-dioxane during manufacturing, but cosmetic-grade ingredients are purified to meet safety standards.

Who should be careful with PEG/PPG-23/17 Copolymer?

Those who strictly avoid synthetic or PEG-based ingredients

Research sources

Cosmetic Ingredient Review (CIR) – Safety Assessment of PEG/PPG CopolymersOpenEuropean Commission CosIng Database – PEG/PPG-23/17 COPOLYMEROpen

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.