Neem (Azadirachta indica) leaf extract is a plant-derived ingredient rich in compounds like nimbidin, quercetin, and azadirachtin, valued for antibacterial, anti-inflammatory, and antioxidant properties. It is used in formulations targeting acne-prone, irritated, or oily skin.
| Reported effect | How often | Notes |
|---|---|---|
| Contact dermatitis / skin irritation | Uncommon | Redness, itching, or burning, particularly at higher concentrations or on sensitive skin. |
| Allergic contact sensitization | Rare | True allergic reactions have been documented in some individuals sensitive to botanical extracts. |
| Dryness or mild stinging | Uncommon | More likely in alcohol-based or high-extract formulations. |
| Systemic toxicity from topical use | Very rare | Concern mainly relates to ingestion or concentrated neem oil; topical leaf extract at cosmetic levels is generally considered low risk. |
Frequencies reflect typical cosmetic use reported in the literature, not a guarantee for your skin.