It keeps it fresh for longer. If you leave olive oil in light, it takes the goodness from it .” Bottle v carton Longer shelf life A 2005 study in European Food Research and Technology journal claimed extra virgin olive oil stored in the light had significantly lower tocopherol, carotenoid and chlorophyll content after a 12 month period than oils stored in the dark. The study said shelf life of the oils exposed to light is shorter than that of oils kept in the dark. Greece is the top olive oil consumer, per capita, in Europe with each person consuming nearly 18kg a year, according to 2011-12 figures from the European Commission. Spain, Italy, and Cyprus are other high consumers.
Source: foodproductiondailyCarton packaging is a cheaper and better way to package olive oil ?,