Extracted by steam distillation of the leaves of this shrub which is distantly related to Tea Tree Niaouli Myrtle etc. Manuka essential oil is relatively new but gaining in popularity in the Northern Hemisphere. Its antiseptic properties have a long history of use by the Maoris & bees that feed on the bush produce a Manuka honey which is prized for its soothing effect on sore throats.p Manuka essential oil contains an unusual chemical leptospermone which has been found to be stro