How long do essential oils last? How are they stored?
If stored in fully topped up, tightly sealed, light impervious containers in a cool place (5 to 20 degrees Centigrade), preferably under nitrogen, then from 6 months to 2 years. Oxygen degrades oils – causing some to lose beneficial properties and causing some constituents to become irritants or sensitizers (especially citrus & conifer oils), so keep bottles tightly closed and out of direct light. It may be advisable to rebottle to smaller bottles as oil is used to minimize the headspace (thereby minimizing contact with oxygen).
