Rosmarinus Officinalis (rosemary) extract is a plant-derived ingredient valued for its antioxidant, anti-inflammatory, and antimicrobial properties, often used to support skin protection and as a natural preservative aid in formulations. Its activity is attributed to compounds such as rosmarinic acid, carnosic acid, and ursolic acid.
| Reported effect | How often | Notes |
|---|---|---|
Contact dermatitis | Uncommon | Allergic or irritant skin reactions reported, particularly in sensitive individuals. |
Skin irritation or redness | Uncommon | More likely with the essential oil form or higher concentrations. |
Allergic sensitization | Rare | Patch-test confirmed contact allergy documented in case reports. |
Photosensitivity | Very rare | Occasional reports, generally associated with concentrated essential oil exposure. |
Frequencies reflect typical cosmetic use reported in the literature, not a guarantee for your skin.
Peer-reviewed papers on this ingredient, via PubMed.