Question: How do I tell if an essential oil bottle is oxidized or no longer good to use? | Tisserand Institute Infographic by Tisserand Institute | Feb 17, 2017 | 0 comments Submit a Comment Cancel replyYour email address will not be published. Required fields are marked *Comment * Name * Email * Website Save my name, email, and website in this browser for the next time I comment. Δ This site uses Akismet to reduce spam. Learn how your comment data is processed.