Glossary
An essential oil steam-distilled from the leaves of eucalyptus trees (Eucalyptus globulus and related species). Eucalyptus oil contains high concentrations of 1,8-cineole (eucalyptol), a compound with documented antimicrobial, anti-inflammatory, and insect-repellent properties.
Eucalyptus oil is one of the most versatile essential oils in natural skincare and wellness. Its primary active compound, 1,8-cineole, has demonstrated broad-spectrum antimicrobial activity against bacteria and fungi in numerous studies. This makes eucalyptus oil useful in cleansing products, wound care, and products designed to maintain skin hygiene.
As an insect repellent, oil of lemon eucalyptus (from Corymbia citriodora, a related species) has been recognized by the CDC as an effective alternative to DEET for repelling mosquitoes. The compound p-menthane-3,8-diol (PMD) is the active repellent component and provides protection comparable to low concentrations of DEET.
Eucalyptus oil is potent and must always be diluted before applying to skin. Undiluted eucalyptus oil can cause irritation, burning, and allergic contact dermatitis. A safe dilution for topical use is typically 1 to 3 percent in a carrier oil or balm base.
In natural skincare products like bug repellent bars and balms, eucalyptus oil is combined with carrier ingredients like beeswax and coconut oil that dilute it to safe levels while providing sustained release on the skin.
When properly diluted to 1 to 3 percent concentration, eucalyptus oil is generally safe for most adults. It should not be used undiluted on skin, near the eyes, or on children under 10. A patch test is recommended for first-time users.
Yes. Oil of lemon eucalyptus (OLE) containing PMD is the only plant-based repellent recommended by the CDC as an effective alternative to DEET. Regular eucalyptus oil also has some repellent properties, though it is less well-studied for this purpose.
Most aromatherapists recommend avoiding eucalyptus oil during the first trimester of pregnancy. After the first trimester, diluted topical use is generally considered safe, but consulting a healthcare provider is recommended.
Keep Learning
Browse hundreds of terms covering honey, beekeeping, and natural skincare.