Hydrogenated Styrene/Butadiene Copolymer is a synthetic polymer used in cosmetics primarily as a film-forming and viscosity-adjusting agent, helping to bind formulations, improve texture, and impart water resistance. It is commonly found in stick products, lipsticks, and emollient-based formulations.
| Reported effect | How often | Notes |
|---|---|---|
| Skin irritation | Rare | Occasional mild irritation reported, generally in sensitive individuals. |
| Contact allergy/sensitization | Very rare | Allergic reactions are uncommon as the polymer is large and generally non-reactive. |
| Acneiform/comedogenic reaction | Rare | Occlusive film-forming nature may contribute to clogged pores in acne-prone skin. |
Frequencies reflect typical cosmetic use reported in the literature, not a guarantee for your skin.