Why are olive oil bottles dark?

Olive oil bottles are usually dark-colored, mainly to prevent the olive oil from oxidizing. Olive oil contains chlorophyll, which evaporates easily when exposed to light, causing the olive oil to lose its original effect. Therefore, olive oil needs to be protected from light during storage to avoid oxidation. Dark glass bottles can effectively block light and reduce the occurrence of oxidation reactions, thus maintaining the quality and characteristics of olive oil. In addition, dark bottles can prevent the impact of ultraviolet rays on olive oil, protect the nutrients and trace elements in it, avoid losses caused by light, and maintain the multiple health effects of olive oil.