Olive oil is a light yellow transparent liquid, known as "liquid gold", and it is a green and healthy food. Studies have found that olive oil in Italian diet is rich in unsaturated cooking foods such as oleic acid, which can enhance the digestive ability of gastrointestinal tract. Olive oil can also control the level of fat in the blood, lower cholesterol and make arteries smoother. Eating 1 ~ 2 tablespoons of olive oil every day can prevent diseases. This is also the secret of Italian longevity. Fatty acids and multivitamins, long-term olive oil.