Rosmarinus Officinalis (Rosemary) Leaf Extract is a plant-derived ingredient rich in polyphenols such as rosmarinic acid and carnosic acid, used in skincare for its antioxidant, anti-inflammatory, and antimicrobial properties. It is commonly added to help protect formulations and skin from oxidative stress.
| Reported effect | How often | Notes |
|---|---|---|
| Contact irritation | Uncommon | Mild stinging or redness, more likely at higher concentrations or on sensitive skin. |
| Allergic contact dermatitis | Rare | Sensitization reported, sometimes linked to constituents shared with fragrance components. |
| Photosensitivity | Very rare | Limited reports; risk generally low for the leaf extract compared with essential oils. |
Frequencies reflect typical cosmetic use reported in the literature, not a guarantee for your skin.