They are natural aromatic compounds distilled from a variety of plants. They have the ability to work on a cellular level.
I believe that doTERRA has the purest and most tested oils in the world. I love their co impact sourcing model. They buy their oils directly from the farmers who grow them without middlemen. doTERRA gives back to communities helping them thrive by building school, wells and hospitals. Lastly I love the quality of the oils them self: The smell divine and they work and are safe to use.