Yes, spice oils should be stored in sunlight-proof bottles, preferably dark-colored glass, to protect them from degradation caused by light exposure. This helps preserve their flavor and potency.
Spice oils are highly concentrated extracts that contain volatile aromatic compounds. These compounds are sensitive to light, heat, and oxygen. Exposure to sunlight can cause these compounds to break down, leading to a loss of flavor, aroma, and even a reduction in the oil's beneficial properties. Sunlight-proof bottles, especially those made of dark-colored glass (such as amber or cobalt blue), block harmful UV rays and minimize light exposure. This helps to maintain the integrity of the spice oil over a longer period. Storing spice oils in clear bottles exposed to sunlight will significantly shorten their shelf life and diminish their quality. Therefore, using opaque or dark-colored bottles is crucial for proper storage.
Even when stored in sunlight-proof bottles, keep your spice oils in a cool, dark place like a pantry or cupboard, away from direct heat sources such as the stove or oven. This will further protect them from degradation and extend their shelf life.