The definition of 'Essential' is 'Absolutely necessary', 'Extremely important' and this sums up these range of oils from Tisserand. I am assured of no additives from this brand. I add 5 drops of pure oil to 10 mls (2teaspoons) of a blending oil (almond, jojoba) for a lovely massage. I prefer to mix the oils - lavender, rosemary and lemongrass is my favourite at the moment.
2 or 3 drops can be added to a running bath...........a drop of lavender oil in my Vacuum cleaner makes the whole house smell beautiful.