Aromatherapy refers to the ancient practice of using various natural scents to promote certain mental and physical outcomes. Most familiar is the use of pure essential oils obtained from a wide assortment of plants, which have been steam distilled or cold-pressed from flowers, fruit, bark, and roots. Aromatherapy can help ease or reduce anxiety, boost energy levels, boost cognitive performance, ease depression, speed up the healing process, eliminate headaches, induce sleep, strengthen the immune system, reduce pain, improve digestion, and increase circulation. Many pure essential oils have powerful antibacterial and antiviral qualities which, unlike pharmaceutical drugs, do not leave behind dangerous toxins.