Which factor causes essential oils to lose potency?

Which factor causes essential oils to lose potency?

• A. Sunlight
• B. Heat
• C. Air exposure
• D. Refrigeration

Answer: (A)

Sunlight is the primary factor that causes essential oils to lose potency because UV light triggers photochemical reactions that quickly break down the oil’s active constituents. These compounds, like terpenes, are sensitive to light, and exposure leads to oxidation and structural changes that reduce both aroma and therapeutic effects. While heat and air exposure can also contribute to degradation over time, and refrigeration can help slow the process for many oils, light exposure accelerates potency loss the most. To preserve potency, store essential oils in dark, airtight containers in a cool place away from direct light—amber glass bottles and avoiding heat and plastic help maintain their quality.

Sunlight is the primary factor that causes essential oils to lose potency because UV light triggers photochemical reactions that quickly break down the oil’s active constituents. These compounds, like terpenes, are sensitive to light, and exposure leads to oxidation and structural changes that reduce both aroma and therapeutic effects. While heat and air exposure can also contribute to degradation over time, and refrigeration can help slow the process for many oils, light exposure accelerates potency loss the most. To preserve potency, store essential oils in dark, airtight containers in a cool place away from direct light—amber glass bottles and avoiding heat and plastic help maintain their quality.