Neem leaf extract (Azadirachta indica) is a plant-derived ingredient valued for its antibacterial, anti-inflammatory, and antioxidant properties, often used in formulations targeting acne and irritated skin. It contains active compounds such as nimbin, nimbidin, and flavonoids that contribute to its biological activity.
| Reported effect | How often | Notes |
|---|---|---|
| Contact dermatitis / skin irritation | Uncommon | Redness, itching, or stinging may occur, particularly in sensitive skin or with high concentrations. |
| Allergic contact sensitization | Rare | Botanical proteins can trigger allergic responses in predisposed individuals. |
| Dryness or mild peeling | Uncommon | Occasionally reported when used in astringent or higher-strength formulations. |
| Systemic toxicity from concentrated/oral neem | Very rare | Relevant to ingestion or undiluted oil, not typical topical cosmetic use; included for context. |
Frequencies reflect typical cosmetic use reported in the literature, not a guarantee for your skin.