Aromatherapy is the art of using essential oils for optimal health. The key is to educate yourself and to use them properly. There is an association of aroma therapists called NAHA …. The National Association of Holistic Aromatherapy. This is a wonderful site and you can ask your questions and have them answered here. Many multi-level marketing companies have people working for them with little information on the proper use of essential oils and they are miss-informing people. Essential oils most often need to be diluted or you can have a reaction that is not good, from skin irritation to death. Pure oils are not meant to be used neat (directly on the skin) or ingested. Plus, you are overpaying on your oils, these companies say that they have the best oils in the world but they are not the only ones. You can get fantastic oils from health food stores and other places. Different parts of the world grow different plants where the oils are obtained for instance Bergamot essential oil comes from Bergamot in Italy. That is where all of the Bergamot comes from. Yes, there are different grades of oils so make sure you’ve got one that comes with a chromatography report.