doTERRA produce a range of Certified Pure Therapeutic Grade® (CPTG) essential oils and essential oil blends. Unlike a lot of essential oils on the market, doTERRA® essential oils can be used either topically, aromatically or internally. Essential oils have been used for thousands of years and have powerful healing properties and high therapeutic value. As with anything we use at assist our health, essential oils need to be used with caution and you should always seek medical advice before starting something new. For aromatic use, we recommend the use of an Ultrasonic Diffuser which uses cool mist diffusion and preserves the chemical composition of the essential oil.