Eucalyptus essential oil is extracted from the leaves of the eucalyptus tree. It has a fresh, minty and invigorating aroma. This essential oil is appreciated for its decongestant, antibacterial and refreshing properties. It is often used in aromatherapy to relieve respiratory problems, soothe headaches and promote mental clarity. Eucalyptus essential oil can also be used in cosmetics for its skin benefits and to create an uplifting atmosphere in living spaces.