How Essential Oils are Made

Essential Oils are generally separated from plant material using steam distillation. This is inherently a temperature/pressure dependent process, where plant matter is essentially boiled and the vapor in the headspace collected to extract the oil, after a few filtration steps. 

The bottom line is that essential oils are created using heat, so diffusing them using heat is the original and quintessentially superior solution to dispersing them and breathing them in.

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