Have you ever smelled something and immediately been taken back to a specific time or place? What about a specific person?
That's because our sense of smell is directly tied to our Limbic System - the part of our brain that controls emotions and memory (among other things). The limbic system is also directly connected to those parts of the brain that control heart rate, blood pressure, breathing, memory, stress levels, and hormone balance (Higley & Higley, 1998).
This means that when essential oils are inhaled, they go directly to the brain. Our other four senses -- taste, sight, touch and hearing -- are first routed through the thalamus before reaching designated areas of the brain.
This is why essential oils can be used to support our emotions. The science behind this is real, and it's fascinating.