Eucalyptus Essential oil is extracted from dry eucalyptus leaves through steam distillation. Eucalyptus is an evergreen tree that is cultivated worldwide, but it is native to Australia. Its ability to promote sweating and open mucus leads to be used in respiratory conditions including flu, asthma, and coughs. The Eucalyptus essential oil is used primarily for the treatment of cough, cold, bronchitis, and relieves colds. More : https://www.theyoungchemist.com/detail/eucalyptus-oil.html