DoTERRA Ginger essential oil is derived from the fresh rhizome of the ginger plant, the subterranean stalk of a plant that shoots out the root system. It has a hot, fragrant flavor when used as a kitchen spice. In Western tradition, it is most often used in sweets—gingerbread and ginger snaps being two examples. Internal use of Ginger oil is best known as a digestive aid and for helping to ease occasional indigestion and nausea. It can also be applied topically or inhaled for a soothing aroma.