Shelf life of essential oils…
Shelf life testing performed on essential oils has shown that essential oils maintain their efficacy even after 5–10 years or more. Storing essential oils properly also plays a major role in ensuring that essential oils maintain their efficacy and beneficial properties over time. Below are some guidelines that should be implemented when storing essential oils:
Store the essential oil in room-temperature conditions and avoid exposure to extreme temperatures (leaving oils in the car during the summer, on window sills, etc.).
Avoid exposing the oils to direct sunlight or other sources of UV rays.
Prevent prolonged exposure to oxygen which can cause oxidation of the oil over time (leaving the cap unscrewed, etc.).
Tightly secure the caps after each use (prevents the oil from evaporating and decreases exposure to oxygen).