This is another very old form of medicine. Many of the Egyptian pharoah’s tombs contained gallons of oils, still good under the top dried layer, after 2,000 years! Essential oils are basically the “blood” of a plant. High quality oils are generally steam distilled or pressed to extract the oil. Poor quality oils are extracted under a chemical process (and so those chemicals will show up in the final product).
Again, we see the relationship to herbal medicine, and essential oils can also be used to alter body chemistry, move blood, detoxify and support organs. And many of them smell good!
“ Holistic Aromatherapy for Animals” by Kristen Leigh Bell