For example, on PubMed (the online resource from the US National Library of Medicine and the National Institutes of Health) a search for 'essential oils' brings up over 13,000 individual scientific studies.
---> It's correct! This is not a typo! Check it out for yourself here: http://www.ncbi.nlm.nih.gov/pubmed/?term=essential+oils
In addition to promoting an overall healthy lifestyle, here is a 'graphic example' of the body systems for which the usage of essential oils could support healthy functioning in people of all ages. Check out included links to individual research studies regarding essential oils and their support of various systems of the body. And this is BARELY the tip of the iceberg!
There is SO much more out there. Do your own research. You WILL be amazed!