A chemist and aromatherapy practitioner provides scientific proof for the effectiveness of using essential oils. Aromatherapy is the fastest-growing segment of the body care industry, an effective and deeply pleasurable way to maintain well-being. Now, Kurt Schnaubelt, a chemist and longtime aromatherapy practitioner, provides scientific proof for the efficacy of essential oils, explained clearly and logically. Advanced Aromatherapy draws on recent research to demonstrate how essential oils work on the cells and microbes of the body. These chemical changes affect emotional states as well as physical ones. Advanced Aromatherapy explains how to treat symptoms ranging from hay fever to stress disorders with predictable results. An essential textbook for aromatherapy practitioners.