Eucalyptus oil remains a favorite among aromatherapists and casual users alike, based on its strong, woody and medicinal aroma. Popular in many vopor rubs, it emits an essence of cleanliness when diffused for aromatherapy. NOW Eucalyptus Oil is 100% pure and steam distilled. Fun fact: In the 19th century, eucalyptus trees were called "fever trees," because they destroyed the breeding ground of the malaria mosquito. The tree grows fast, and uses up large amounts of water, thus large amounts of the trees can turn swamp into usable land - and also rid the area of mosquitos in the process. Centuries ago, the eucalyptus tree was thought to cleanse the environment, so the frail and sickly would choose to live in areas where these fragrant trees grew, hoping for recovery from their ailments. While just living under the trees might not be the cure people hoped for, the tree does indeed offer healing. The Australian Aborigines applied crushed eucalyptus leaves to wounds to promote healing. They also used eucalyptus leaves to fight infection and relieve muscular pain. In India, eucalyptus is used to cool fever and fight contagious diseases. Even Western surgeons recognized the benefits of eucalyptus, and have used a eucalyptus solution to wash out operation cavities. Today, eucalyptus is used in many different types of pharmaceutical products, from vapor rubs to cold remedies. Even veterinarians and dentists use eucalyptus in their practices. Its sweet, menthol, woody scent coupled with its proven healing abilities makes it a favorite essential oil in aromatherapy. Mixes well with: Basil, bergamot, cedarwood, citronella, ginger, grapefruit, juniper, lavender, lemon, lime, marjoram, orange, oregano, peppermint, pine, rosemary, spearmint, tea tree, and thyme. Parts used: Fresh or partially dried leaves and young twigs. Extraction method: Steam distillation.