If you have ever enjoyed the scent of a rose, you’ve experienced the aromatic qualities of essential oils. These naturally occurring, volatile aromatic compounds are found in the seeds, bark, stems, roots, flowers, and other parts of plants. Essential oils provide plants with protection against environmental threats and play a role in plant pollination. In addition to their intrinsic benefits to plants and being beautifully fragrant to people, essential oils have long been used for food preparation, beauty treatment, and health-care practices.