Citrus Aurantium Dulcis Peel Oil

Citrus Aurantium Dulcis (orange) peel oil is a fragrant essential oil typically used at low concentrations but contains volatile terpenes (notably limonene) that are well-documented causes of irritant reactions and, when oxidized, allergic contact dermatitis in patch-tested populations. In sensitive or eczema-prone skin, even small amounts can sting, disrupt barrier recovery, and add cumulative irritation when layered with other actives, so I score it as a significant risk ingredient from a patient-safety standpoint. Safety Notes: In mainstream leave-on skincare, Citrus Aurantium Dulcis (Orange) Peel Oil is often used at trace levels (~0.0001–0.05%) as a fragrance/allergen component within parfums or as a minor essential-oil note; rinse-off cleansers and soaps commonly sit around ~0.05–0.5% for scent impact and wash-off exposure. Higher consumer-available “natural” facial oils/balms and aromatherapy-style cosmetic blends can reach ~1–5% (typically diluted in carrier oils), with levels above this being uncommon in general OTC skincare due to irritation/phototoxicity risk management and IFRA-aligned allergen control, especially for leave-on applications.