In general, shelf life is determined by the chemical composition of the essential oils, some of which oxidize or evaporate more quickly than others.. Essential oils which contain a lot of phenols may last up to 3 years. Essential oils which contain ketones, monoterpenols, and/or esters have a shelf life of 4-5 years.
Essential oils do not go rancid, but they do have a shelf life. Essential oils can oxidize, deteriorate, lose their therapeutic value and aromatic quality. Learn how to .
Do essential oils expire?. Instead, my only choices will be to (a) figure out a very regular way to use it up, which my new diffuser should help with, or (b) give it .