How should I store essential oils, and do they expire?
Short answerYes, essential oils degrade over time as they oxidise. Store them in dark glass bottles, tightly capped, away from heat and sunlight — many keep a cool, dark cupboard or the fridge. Most last 1–3 years; citrus oils oxidise fastest (1–2 years), while woods and resins last longest.
Essential oils don't "go rancid" like food, but they do oxidise — exposure to air, heat and light slowly changes their chemistry, weakening the aroma and making some oils more likely to irritate skin.
Storage best practice
- Dark glass (amber or cobalt), tightly closed to limit air exposure.
- Cool and dark — a cupboard away from radiators and windows; some people refrigerate.
- Minimise headspace — as a bottle empties, more air speeds oxidation; decant if needed.
- Label with the open date so you can track age.
Rough shelf life
- Citrus (lemon, lime, orange, bergamot): ~1–2 years.
- Most florals/herbs: ~2–3 years.
- Woods, resins, patchouli, sandalwood: often longer, and some improve with age.
If an oil smells sharp, "off," or unlike it used to, it has likely oxidised — retire it from skin use.
What people actually say
Real, unedited voices from Reddit communities and verified Amazon.com reviews — cited, not paraphrased.
“At that price it would likely be terribly oxidized and possess a non-standard composition.”