NOW Foods Eucalyptus Globulus Oil is a 100% pure essential oil steam-distilled from the leaves of Eucalyptus globulus — the most widely used eucalyptus species for therapeutic purposes, prized for its high 1,8-cineole (eucalyptol) content that gives it its characteristic refreshing, camphoraceous aroma. Eucalyptus oil has a long history of use for respiratory support via steam inhalation, diffusion, and topical application to the chest — helping to open airways and support easier breathing during cold and allergy seasons. It also has demonstrated antimicrobial properties and is commonly used in natural cleaning products. NOW Foods' Eucalyptus Globulus is GC/MS tested to verify purity and correct cineole content. For aromatic and topical use; dilute before applying to skin. Not for internal use.