"Alternative Medicine Practice Test 2026: Comprehensive Guide to Master Aromatherapy, Massage, and Reflexology"

The idea being tested is how long essential oils typically stay potent and usable when stored properly. When kept in dark glass bottles, tightly capped, and stored in a cool, protected spot away from light and heat, most essential oils maintain their aroma and therapeutic qualities for at least two years. Oxidation from air exposure and light gradually degrades the oils, so they don’t last indefinitely, and citrus oils especially tend to fade a bit faster than many others. That makes two years a reasonable baseline for “most” essential oils, rather than less than one year or about one year, and certainly not indefinitely. If the scent or color changes noticeably, it’s a sign to retire the oil.