Generally, the lifespan of an essential oil varies quite a lot. Oxygen, heat and light all affect the overall degradation of the oil - so storage is critical to its preservation. For example, Sweet Orange oxidises very quickly and has a shelf life of about 18-24 months, while Patchouli can get better with age.
Expiry dates and batch numbers are not mandatory on essential oils. However, we choose to include them on most of our Zea Essentials so that you have some idea of when the oil produced. It also helps us keep track of different batches and the testing results associated with each batch.
The expiry date should be treated as a guide only. We recommend that you use your own judgment before discarding an expired oil. You just may be discarding a perfectly good oil which has matured over time!
If you have any questions at all please don't hesitate to reach out to our Customer Service Team at hello@zea.com.au