Essential oils are fragrant, which are highly concentrated natural components that are found in plants. Essential oils have been used for thousands of years in different cultures for medicinal, beauty and health purposes. These essential oils have recently gained popularity as a natural, safe and cost-effective therapy for some health and beauty concerns. These are obtained from the leaves, stems, fruit, bark, flowers, roots, or seeds of plants. They are a highly intensive form of volatile oils—another name for essential oils—and have many beneficial properties. Historians estimate that human beings have been using essential oils for 5,000 to 6,000 years for medicinal, cosmetic, and hygienic purposes.