Calophyllum Inophyllum Seed Oil

Calophyllum Inophyllum Seed Oil (tamanu oil) is an emollient lipid typically used around ~1–10% (sometimes higher) for barrier support and soothing claims. Despite being a carrier oil, it contains a complex mixture of bioactive constituents that have documented potential for contact allergy/irritant reactions in susceptible users, and flare risk is higher in eczema-prone skin where barrier impairment amplifies responses. In routine leave-on use, most tolerate it, but the sensitization/irritation signal is significant enough to classify it as mild rather than gentle for highly reactive patients. Safety Notes: In commercial skincare, Calophyllum Inophyllum Seed Oil (tamanu oil) is used at very low levels (~0.05–0.2%) as a supportive lipid/marketing oil in emulsions, serums, and lotions where it’s one of many botanical oils. More commonly it appears around 0.5–10% in leave-on moisturizers, barrier creams, balms, and facial oils to deliver emolliency and a characteristic sensorial profile. The upper end reaches 100% in consumer-available single-ingredient “pure tamanu oil” products and near-neat anhydrous blends marketed as treatment oils (typically leave-on); rinse-off cleansers/soaps may include it but generally at lower percentages due to cost and wash-off.