@donfield Hi A good place to start is print out a form from Essential OIl.com they will give you the oils that help with certain diseases and how to mix then or use them without the carrier oil like Almond or coconut oil the fractured oil and others. The chart on the oils will help you . Depends on what you are using the Eucalyptus for if you rub it on by itself SOme oils you can ingest others are only used in a diffuser so to know exactly how you want to use the oils you should get a chart on the oils and how to use them . I would do your own research on them ,the internet is full of information. Essential oils.com will help you Thanks for your interest.