When looking at buying essential oils the things I look for is that the product is 100% essential oil and not a fragrance oil which is a synthetic version. This ensures that you are getting the beneficial properties from essential oils and not just a pretty smell. I also look for tried and true brands that can be dependable. There are also a range of organic essential oils available which can be a bit more expensive but it’s a personal choice of which ones you choose. I suggest that you talk to the sales person or read up on the oils you are wanting to buy to make sure they are safe for you to use for example some essential oils may not be recommended during pregnancy or certain trimeters in the pregnancy. Healthpost have really nice essential oils including organic essential oils available.