The olfactory system includes organs and cells related to our sense of smell. When we inhale through the nose, airborne molecules interact with the olfactory system and, almost immediately, the brain. Molecules inhaled through the nose are also carried to the lungs and interact with the respiratory system. During inhalation, odor molecules travel through the nose and affect the brain through a variety of receptor sites, including the limbic system. The limbic system is connected to the areas of the brain that control heart rate, blood pressure, breathing, memory, stress levels, and hormone balance (Higley & Higley, 1998).
Essential oils have a wide array of known benefits, including improvement of a variety of respiratory complaints(2). Inhalation is considered the safest and most effective means of administering essential oils. By inhaling the right blend of essential oils, someone suffering from bronchial and sinus congestion, sore throats, colds, coughs, and other seasonal discomfort can see improvement(3). In addition, the inhalation of essential oils supports overall well-being in many other ways.