From ancient times to the present, the development of human civilization is closely related to the changes of dietary habits. Olive oil is one of the few ingredients that stand out in the world of gastronomy and even in comparison to human civilization. The olive and olive oil cultures are closely linked to the entire Mediterranean civilization and have been regarded as symbols of peace, justice and wisdom. In Roman times, olive oil was even the most sacred and precious articles of tribute. It was the nectar of the gods and the gift from the goddess. Only kings, nobles, priests and victorious leaders could enjoy it. Its noble symbolism and rarity has given olive oil another name -- "liquid gold". 

Since ancient times, olive oil has been the most precious and versatile resources in the nature, and it is also the kernel of the Mediterranean Diet. Mediterranean people use all kinds of olive oil to the extreme, cooking different delicious food with different unique flavor. It has even been said that the secret to Mediterranean cuisine lies in the special olive oil. Generally speaking, olive oil used for cooking are divided into three main types, which rank from high grade to low grade are: Extra Virgin Olive Oil, Virgin Olive Oil and Ordinary Olive Oil. Extra Virgin Olive oil, as implied by the name, is completely unprocessed and unadulterated and is commonly used for dipping bread and other foods that you can eat without cooking. This olive oil, which is usually obtained by cold pressing harvested olives for the first time, is the best and most expensive type and has the best health benefits and taste. Virgin Olive Oil, the second best, has the same process as extra virgin, but lower quality. And the ordinary olive oil, which is generally a mixture of the two previous olive oils, belongs to the third grade and is the most affordable olive oil.

Source: www.food2china.com