There are different types of the juice of the golden value fruit, depending on the rapeness and type of the olive and also methods of extracting.
The best type is extra virgin olive oil. It is extracted using natural methods and standardized for purity and certain sensory qualities like taste and smell.
Olive oil that is truly “extra virgin” has a distinctive taste and is high in phenolic antioxidants, the main reason why (real) olive oil is so beneficial.
Olive oil may be one of the healthiest foods you can eat for heart health. It lowers blood pressure, protects LDL particles from oxidation, reduces inflammation and may help prevent unwanted blood clotting.
Extra-virgin olive oil comes from virgin oil production only, contains no more than 0.8% acidity, and is judged to have a superior taste. Extra Virgin olive oil accounts for less than 10% of oil in many producing countries. It is used on salads, added at the table to soups and stews and for dipping.
Extra virgin is the highest quality and most expensive olive oil classification. It should have no defects and a flavor of fresh olives.
In chemical terms extra virgin olive oil is described as having a free acidity, expressed as oleic acid, of not more than 0.8 grams per 100 grams and a peroxide value of less than 20 milliequivalent O2.
It must be produced entirely by mechanical means without the use of any solvents, and under temperatures that will not degrade the oil (less than 86°F, 30°C).
In order for an oil to qualify as “extra virgin” the oil must also pass both an official chemical test in a laboratory and a sensory evaluation by a trained tasting panel recognized by the International Olive Council. The olive oil must be found to be free from defects while exhibiting some fruitiness.
Since extra virgin olive oil is simply pressed fruit juice without additives, the factors influencing its quality and taste include the varieties of olives used.
Olive oil tasters describe the positive attributes using the following terms:
Fruity: Having pleasant spicy fruit flavors characteristic of fresh ripe or green olives. Ripe fruit yields oils that are milder, aromatic, buttery, and floral. Green fruit yields oils that are grassy, herbaceous, bitter, and pungent. Fruitiness also varies by the variety of olive.
Bitter: Creating a mostly pleasant acrid flavor sensation on the tongue.
Pungent: Creating a peppery sensation in the mouth and throat