Adapted from The Healing Powers of Essential Oils: A Complete Guide to Nature’s Most Magical Medicine, by Cal Orey, published by Kensington, 2020. Cal Orey, M.A., is an author and journalist.

That’s also why it’s so important to buy therapeutic or medical-grade essential oils. “Make sure that they’re actually plant extracts and not just fragrance,” she says.

Because it's an unregulated industry, there is a lot of filthy ingredients in non-therapeutic grade essential oils," she said. She said if you plan to use them, do your homework.