Hi, Dorothy. Great question, and this may be something you’ll want to run by an aromatherapist as they have more training in how EOs are made. But, from my understanding, whether the essential oil is extracted via steam (water), alcohol, or CO2… none of that comes through in the final product. As in, you don’t actually have water or alcohol or CO2 in the final essential oil. So, when you’re blending, you’re actually blending oil with oil regardless of the extraction process and emulsifiers aren’t needed. Now, I could be totally wrong there. Again, you’ll need to ask someone more knowledgeable in that area. Hope this helps.
Just because these two brands frequently recommend taking essential oils internally doesn’t mean their brands can be and others can’t. It just means they give unsafe advice that is contrary to what any real aromatherapist would advise. People have gotten seriously hurt by following this advice. The International Association of Holistic Aromatherapist says that essential oils should never be taken internally unless you are advised to do so by a clinical aromatherapist who has appropriate training in anatomy, physiology, chemistry, etc. This has nothing to do with oil purity and everything to do with the fact that essential oils are very powerful.
The oils themselves are amazing! I diffuse them in my room and they create a very calm atmosphere. I love all of the oils except for the Thrive oil. For some reason I just hate the smell of it and and can't even open the bottle. That's not the oils fault though, that's just my personal preference I suppose. This set was a great way to find some new oils that I like and 5 out of the 6 were great! The rating would have been a 5 star if one of the oils didn't leak a bit in the packaging, but overall I'm really happy with my purchase.