Melia Azadirachta Flower Extract

Melia azadirachta (neem) flower extract is a botanical extract used for soothing/antimicrobial and antioxidant claims, typically at low percentages, but it contains multiple bioactive compounds that can act as irritants or allergens in susceptible individuals. Human data are limited and botanical extracts show meaningful rates of positive patch tests and eczema flares in reactive skin, especially when used in leave-on products or alongside other actives. Given the uncertainty and the real risk of sensitization in compromised barrier patients, I score it as moderate and recommend patch testing for sensitive or eczematous skin. Safety Notes: In mass-market leave-on skincare (serums, creams, toners) this extract is commonly used at very low levels (often 0.001–0.1%) as a supporting botanical, especially when supplied in a standardized extract blend or when INCI-listed for marketing at trace levels. Higher-strength consumer-available products—particularly “neem” focused masks, spot treatments, and botanical gels—can reach ~1–5% when the supplier extract is compatible with the base and odor/color are managed; above this, sensorial issues and irritation risk typically limit use in OTC products. Rinse-off formats (cleansers/masks) more often sit toward the upper end compared with leave-on products.