The sense of smell is a tool that can elicit powerful physiologic, mental, and emotional responses. Essential oils are quickly absorbed by the smell receptors, which have a direct link to the limbic system by way of the olifactory nerve. The limbic system is part of the brain that supports a variety of functions including smell, emotions, behavior, and memory. For this reason, essential oils have an especially powerful effect via aromatic application.
Some essential oils induce uplifting or invigorating effects, while others are more calming. Diffusion is one of the simplest methods for using essential oils aromatically. Diffusers that use cold air or water are ideal. However, using essential oils aromatically does not require any special diffusing devices.