Another limitation is the ecological variance of oil composition.
The exact percent of constituent composition in an essential oil
depends on the geographical location, time of year, and even the
time of day the plants are harvested. The composition of an es-
sential oil isn’t always identical to the percentages presented in
this booklet. However, the percentages given here are considered
standard, meaning that they represent the most likely composi-
tion for each oil. In fact, dōTERRA’s staff of analytical chemists work
hard to ensure that every batch of oil matches these standards
within a reasonable margin.
We hope that you will enjoy having this valuable information at your
fingertips as you browse this reference on essential oil chemistry.
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