At Amy's Body Therapy, we only use the highest quality of therapeutic grade essential oils from the reputable Young Living. Their transparency and ethical conduct provides top quality oils extracted from their farms. A link to their website can be found here.
"The fragrance of an essential oil can directly affect everything from your emotional state of your lifespan. The specific mechanics of the sense of smell are still being described as working like a lock and key or an odor molecule fitting a specific receptor site.
When a fragrance is enhaled the airborne odor molecules travel up the nostril to the olfactory epithelium or the center of olfactory sensation. As the olfactory epithelium, which is only about one sqaure inch of the nasel cavity, olfactory receptors cells are triggered and send an impluse to the olfactory bulb. Each olfactory receptor type sends an impluse to a particular microregion, or glomerulus, or the olfactory bulb. There are around 2,000 glomeruli in the olfacotry bulb which receive the impluses from the olfactory receptors and allows us to perceive many smells. The olfactory bulb then transmits the impulses to other parts of the brain, including the gustatory center (where the sensation of taste is perceived), the amygdala (where emotional memories are stored), in other parts of the limbic system.
Because the limbic system is directly connected to those parts of the brain that control heart rate, blood pressure, breathing, memory, stress levels, and hormone balance, essential oils can have profound physiological and psycholgical effects." (1)
(1) Essential Oils Pocket Reference 6th Edition, pg 26-27, D. Gary Young