Amyris Balsamifera Bark Oil

Amyris balsamifera bark oil (amyris/sandalwood-like essential oil) is used primarily as a fragrance component at low concentrations, but it contains volatile terpenoid constituents that are well-documented triggers for irritant and allergic contact dermatitis in fragrance-sensitive and eczematous patients. Even when used below 1%, repeated leave-on exposure can contribute to cumulative barrier stress and sensitization risk, so I score it as a significant irritant/allergen concern for reactive skin. Safety Notes: In commercial skincare, Amyris balsamifera (amyris/sandalwood-like) bark oil is most often used as a fragrance/essential-oil component at trace to very low levels (commonly ~0.0001–0.05%) in leave-on creams/serums and rinse-off cleansers to impart scent while managing sensitization risk. The upper end is seen in consumer-available “essential-oil” balms, facial oils, and aromatherapy-style moisturizers where amyris is used as a primary odorant/fixative and can approach about 0.5–1.0% in leave-on products; higher levels are uncommon due to skin tolerance and fragrance allergen/IFRA-style exposure considerations.