The branches and berries of the Juniper, a coniferous tree, have been used for medicinal and spiritual purposes since ancient times. Native Americans use juniper berries for medicinal applications and burn the berries to cleanse and purify the air. Juniper berries are a natural antiseptic, as is the essential oil. It may help combat acne when used at low dilutions in skin care applications. A room diffusion with Juniper Berry Essential Oil may help to kill airborne germs. Juniper Oil has a distinctive aroma that is woody, sweet, fresh and crisp. It blends well with wood oils.