Function: soothe the spirit, purify the air Water-soluble plant essential oil Aromatherapy essential oils are plant essences extracted from plants with fragrance, which is often referred to as plant extracts. Hormones. Aromatherapy developed in modern Europe is a method of using aromatherapy essential oils to protect the body and mind. Aromatherapy essential oils that extract the essence of plants have a special fragrance, which can refresh the air and create beauty. Good atmosphere space!