
DoTERRA's website has some great information including....
Multiple studies show that Lavender essential oil offers far more than just a pleasant smell. When taken internally, Lavender oil was shown to directly affect the brain’s serotonin system*.(1) Experimental research suggests that lavender essential oil may also possess antioxidant properties* (2) and also help to support the immune function of certain cells*.(3) All those volatile chemicals have potential to quickly and effectively interact with our physiology. It’s one of the ways essential oils are so powerful.
*These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure or prevent disease. - See more at: https://doterra.com/US/en/blog/safety-physiology-unique-character-of-essential-oils#sthash.tGiqMp1q.dpuf