Fragrant plant oil whose active constituents are found in the leaves and in the oil obtained from them. The oil has antimicrobial and antifungal activity, but is also a potent skin irritant due to its chemical components, some of which are toxic and can be fatal if ingested. Truly a mixed bag, this oil, like rosemary oil, has benefits and risks. Low amounts of eucalyptus oil do not seem to pose a risk of allergic contact dermatitis in the general population, its fragrance components are known irritants, and skin can be very good at concealing when it’s being irritated. [1,2]
- Higgins C, Palmer A, Nixon R. Eucalyptus oil: contact allergy and safety. Contact Dermatitis. 2015;72(5):344-6.
- Nielsen J. Natural oils affect the human skin integrity and the percutaneous penetration of benzoic acid dose-dependently. Basic Clin Pharmacol Toxicol. 2006;98(6):575-81.