[header] How to buy essential oils [title] Think about why you want to use an essential oil. [step] Different oils suit different needs so it's important to know what you wish to achieve by using essential oil. For example, lavender can be used in a diffuser to relax and reduce anxiety and sage essential oil can be used as an antiseptic in wounds or as an anti-inflammatory. 
[title] Talk to an herbalist or a natural foods grocer. [step] There are many uses for essential oils.