Stop by any well-stocked natural foods outlet that sells essential oils, or visit the website of a producer which prides itself on variety, and you may see nearly 100 different essential oils for sale.
Lavender oil? Peppermint oil? Eucalyptus? Lemon? Sweet orange? There’s no mystery there. Even your pre-schoolers could guess where those essential oils (EOs) are sourced from.
But tea tree oil? What in the world is tea tree? Is it really even a tree?