In my book, The Healing Art of Essential Oils, I write about the shelf-life of essential oils based on the research by expert Robert Tisserand. Here is an article from Plant Therapy one of my recommended companies that breaks it down for you: https://www.planttherapy.com/blog/2018/04/12/do-essential-oils-expire-heres-the-scoop/
Wonderful article on the shelf life of Essential Oils.
