Aura Cacia's Pure Peppermint Essential Oil is the perfect addition to your aromatherapy routine. Peppermint (Mentha x Piperita) is the second most popular essential oil in the United States. Our pure peppermint essential oil is cooling to the skin and gives off a fresh, grassy aroma. Aura Cacia's peppermint essential oil is sourced in the Northwestern United States.