Lemon (Citrus limon) fruit extract is a botanical ingredient rich in vitamin C, citric acid, and other natural acids, used in skincare for its purported brightening, antioxidant, and astringent properties. It can contribute mild exfoliation and skin-toning effects, though potency varies widely by formulation.
| Reported effect | How often | Notes |
|---|---|---|
Skin irritation or stinging | Common | Citric and other acids can irritate, especially on sensitive or compromised skin. |
Photosensitivity / phototoxic reaction | Uncommon | Citrus extracts may contain furocoumarins (e.g., bergapten) that increase UV sensitivity; concentration-dependent. |
Allergic contact dermatitis | Uncommon | Fragrance components and limonene oxidation products are known sensitizers. |
Dryness or barrier disruption | Uncommon | Astringent and acidic action may strip skin lipids with overuse. |
Post-inflammatory hyperpigmentation | Rare | Can follow phototoxic burns, particularly on darker skin tones. |
Severe blistering (phytophotodermatitis) | Very rare | Reported mainly with high concentrations of expressed citrus oils plus strong sun exposure. |
Frequencies reflect typical cosmetic use reported in the literature, not a guarantee for your skin.
Peer-reviewed papers on this ingredient, via PubMed.