Portuguese gastronomy is world renowned for its cod, Port wine, and Olive Oil. This last one, by the way, is very famous and is on the list of the best in the world.
In Portugal, unlike in other countries, olive oil is made from olives and no oil is added.
The Portuguese maxim that the older the better does not apply to olive oil. Portuguese olive oil should be consumed as soon as possible to maintain its properties.
Experts recommend that a bottle be consumed within a month.