In our reference data, Limonene is an EU-declared allergen.
Limonene is a naturally occurring monoterpene derived from citrus peel oils, commonly used as a fragrance component and solvent in cosmetic formulations. On exposure to air it oxidizes, forming compounds with greater sensitizing potential.
| Reported effect | How often | Notes |
|---|---|---|
Allergic contact dermatitis | Uncommon | Primarily caused by oxidized limonene (hydroperoxides); a recognized fragrance allergen requiring labeling in some regions. |
Skin irritation | Uncommon | Redness, stinging or itching, more likely on sensitive or compromised skin. |
Photosensitivity reactions | Rare | Occasionally reported, though less pronounced than with citrus-derived furocoumarins. |
Worsening of eczema or sensitive-skin conditions | Uncommon | Fragrance components can aggravate pre-existing dermatitis. |
Frequencies reflect typical cosmetic use reported in the literature, not a guarantee for your skin.
Peer-reviewed papers on this ingredient, via PubMed.