Simethicone is a silicone-based defoaming and skin-conditioning ingredient used in cosmetic formulations to reduce surface foam and impart a smooth, protective feel. It is generally considered inert and non-irritating on skin.
| Reported effect | How often | Notes |
|---|---|---|
Mild skin irritation | Rare | Occasional transient redness or irritation, typically in sensitive individuals. |
Allergic contact dermatitis | Very rare | Isolated case reports; sensitization to silicone-based ingredients is uncommon. |
Follicular occlusion or comedone formation | Very rare | Theoretical concern with heavy silicone layering; not well substantiated in research. |
Frequencies reflect typical cosmetic use reported in the literature, not a guarantee for your skin.
Peer-reviewed papers on this ingredient, via PubMed.