Extracts of Eucalyptus have been an integral part of folk therapy for centuries, and it is well documented in numerous early historical texts. NOW Eucalyptus Oil is steam distilled from Eucalyptus trees and is 100% pure. Eucalyptus oil is perfect for aromatherapy use, which is it's primary use. Eucalyptus oil has a pungent, liniment fragrance and is often used for it's invigorating properties.