Ethylene/Propylene Copolymer is a synthetic polymer used in cosmetic formulations primarily to adjust viscosity, stabilize emulsions, and form a light film. It functions as a thickening and texture-modifying agent rather than a biologically active treatment ingredient.
| Reported effect | How often | Notes |
|---|---|---|
| Skin irritation | Rare | Mild, transient irritation occasionally reported, typically formulation-dependent. |
| Contact allergy / sensitization | Very rare | Allergic reactions are uncommon as the polymer is generally inert and non-reactive. |
| Comedogenicity / pore congestion | Rare | Heavy film-forming use may theoretically contribute to occlusion in acne-prone skin. |
Frequencies reflect typical cosmetic use reported in the literature, not a guarantee for your skin.