[Online] Free course text ⑧ What is a safe essential oil?

We have created 10 types of "ZOOM Enlightenment / Dissemination Free Course Textbooks" that can be used by instructors.
Considering that member instructors can use ZOOM to give free lectures and improve their instructor skills,
The association made a textbook.
It is 10 times in total.
The 8th time, it will be the text of "What is a safe essential oil?"
If you want to participate in "What is Safe Essential Oil?", Please register as a general user and download the text.