dōTERRA's Certified Pure Therapeutic Grade essential oils are guaranteed to be 100% pure and natural and free of synthetic compounds or contaminates. They are subjected to rigorous mass spectrometry and gas chromatography testing to ensure extract composition and activity. dōTERRA's 100% pure essential oils represent the safest and most beneficial essential oils available today. I would be happy to let you smell and sample these wonderful oils so you can see their quality! Once you decide you love them as much as I do, I would be happy for you to join my team and continue to spread the health and wealth of dōTERRA.