Adulteration occurs in a number of ways. (i) Addition: invisible, where a vegetable or mineral oil is added to dilute the essential oil (EO) or visible, the addition of a constituent like alcohol, (ii) Mixture: with cheaper essential oils such as Rosemary EO being diluted with eucalyptus and/or white camphor oils, and (iii) Synthetic "nature identical" addition, such as when bergamot EO is adulterated with linalol and/or linalyl acetate. The only way to confirm if adulteration has occurred is through gas chromatography (GC) and manufacturers using essential oils should request an HPLC (liquid chromatography) test of the essential oils they are buying from their supplier to ensure strict compliance.
The reason for this is that the essential oils must be pure to provide the benefits that they promise and are expected. Adulteration can reduce and/or remove these properties and even introduce undesirable ones.
- EO's contain many powerful antioxidants
- Many EO's facilitate the release of endorphins
- EO's are often immune system stimulants
- Some EO's are natural chelators
- EO's are often antibacterial, antifungal, antiviral
- EO's can act as nutrient transport agents to cells
- Most EO's contain terpenes that are beneficial to cellular function