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Because cells are surrounded with a lipid membrane, essential oils are attracted to and able to penetrate the cell membrane to deliver nutrients to the cell nucleus.[103],[104],[105],[106],[107] This suggests that essential oils can affect cell function and behavior, thus influencing overall well-being. At the same time, the aroma of the essential oil that is inhaled travels to the limbic system where a cascade of psychophysiological effects is triggered in response.
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Scott A. Johnson (Evidence-Based Essential Oil Therapy: The Ultimate Guide to the Therapeutic and Clinical Application of Essential Oils)