Rosmarinus Officinalis (Rosemary) Extract is a plant-derived ingredient rich in polyphenols such as rosmarinic acid and carnosic acid, valued for its antioxidant and anti-inflammatory properties in skincare. It is commonly used to help protect against free-radical damage and may provide mild antimicrobial benefits.
| Reported effect | How often | Notes |
|---|---|---|
| Skin irritation or stinging | Uncommon | More likely at higher concentrations or on sensitive/compromised skin. |
| Allergic contact dermatitis | Rare | Sensitization to botanical components or to the essential oil fraction has been reported. |
| Photosensitivity reactions | Very rare | Occasionally noted, generally associated with essential oil rather than refined extract. |
Frequencies reflect typical cosmetic use reported in the literature, not a guarantee for your skin.
Peer-reviewed papers on this ingredient, via PubMed.