Rosmarinus Officinalis (rosemary) Leaf Extract is a plant-derived ingredient valued for its antioxidant and anti-inflammatory properties, largely attributed to compounds such as rosmarinic acid, carnosic acid, and carnosol. It is used in skincare to help protect against oxidative stress and may also serve as a natural preservative-boosting or astringent agent.
| Reported effect | How often | Notes |
|---|---|---|
| Contact dermatitis / skin irritation | Uncommon | Localized redness or itching, more likely in sensitive skin or at higher concentrations. |
| Allergic contact sensitization | Rare | Documented in patch-test studies; cross-reactivity possible in those allergic to Lamiaceae (mint family) plants. |
| Photosensitivity or stinging | Rare | Occasional reports, particularly with extracts containing residual essential oil components. |
Frequencies reflect typical cosmetic use reported in the literature, not a guarantee for your skin.
Peer-reviewed papers on this ingredient, via PubMed.