Information about Olive Oil

Olive oil's health benefits

The greatest exponent of monounsaturated fat is olive oil, and it is a prime component of the Mediterranean Diet. Olive oil is a natural juice which preserves the taste, aroma, vitamins and properties of the olive fruit. Olive oil is the only vegetable oil that can be consumed as it is - freshly pressed from the fruit.

The beneficial health effects of olive oil are due to both its high content of monounsaturated fatty acids and its high content of antioxidative substances. Studies have shown that olive oil offers protection against heart disease by controlling LDL ("bad") cholesterol levels while raising HDL (the "good" cholesterol) levels. (1-3) No other naturally produced oil has as large an amount of monounsaturated as olive oil -mainly oleic acid.

Olive oil is very well tolerated by the stomach. In fact, olive oil's protective function has a beneficial effect on ulcers and gastritis. Olive oil activates the secretion of bile and pancreatic hormones much more naturally than prescribed drugs. Consequently, it lowers the incidence of gallstone formation.

Olive oil and heart disease

Studies have shown that people who consumed 25 milliliters (mL) - about 2 tablespoons - of virgin olive oil daily for 1 week showed less oxidation of LDL cholesterol and higher levels of antioxidant compounds, particularly phenols, in the blood.(4)

But while all types of olive oil are sources of monounsaturated fat, EXTRA VIRGIN olive oil, from the first pressing of the olives, contains higher levels of antioxidants, particularly vitamin E and phenols, because it is less processed.

Olive oil is clearly one of the good oils, one of the healing fats. Most people do quite well with it since it does not upset the critical omega 6 to omega 3 ratio and most of the fatty acids in olive oil are actually an omega-9 oil which is monounsaturated.

Olive oil and colon cancer

Spanish researchers suggest that including olive oil in your diet may also offer benefits in terms of colon cancer prevention (5). Their study results showed that rats fed diet supplemented with olive oil had a lower risk of colon cancer than those fed safflower oil-supplemented diets. In fact, the rats that received olive oil had colon cancer rates almost as low as those fed fish oil, which several studies have already linked to a reduction in colon cancer risk.

Types of olive oil

Generally, olive oil is extracted by pressing or crushing olives. Olive oil comes in different varieties, depending on the amount of processing involved. Varieties include:

When buying olive oil you will want to obtain a high quality EXTRA VIRGIN oil. The oil that comes from the first "pressing" of the olive, is extracted without using heat (a cold press) or chemicals, and has no "off" flavors is awarded "extra virgin" status. The less the olive oil is handled, the closer to its natural state, the better the oil. If the olive oil meets all the criteria, it can be designated as "extra virgin".

What is pure and light olive oil? "Pure" olive oil is made by adding a little extra virgin olive oil to refined olive oil. It is a lesser grade oil that is also labeled as just "olive oil" in the U.S.

"Light" olive oil is a marketing concept and not a classification of olive oil grades. It is completely unregulated by any certification organizations and therefore has no real precedent to what its content should be. Sometimes, the olive oil is cut with other vegetable oils.

How to care for your olive oil

Resist the temptation to place your beautiful bottle of olive oil on the windowsill. Light and heat are the #1 enemy of oil. Keep olive oil in a cool and dark place, tightly sealed. Oxygen promotes rancidity. Olive oil is like other oils and can easily go rancid when exposed to air, light or high temperatures.

References

1.Keys A, Menotti A, Karvonen MJ, et al.: The diet and 15-year death rate in the Seven Countries Study. Am J Epidemiol 124: 903-915 (1986)

2.Willett WC: Diet and coronary heart disease. Monographs in Epidemiology and Biostatistics 15: 341-379 (1990)

3.World Health Organization: Diet, nutrition, and the prevention of chronic diseases. Report of a WHO Study Group. WHO Technical Report Series 797, Geneva 1990

(4) European Journal of Clinical Nutrition April 2002;56:114-120

(5) Gut 2000;46:191-199.

Olive Oil History (from Global Gourmet)

 
 Homer called it "liquid gold." In ancient Greece, athletes ritually rubbed it all over their body. Its mystical glow illuminated history. Drops of it seeped into the bones of dead saints and martyrs through holes in their tombs. Olive oil has been more than mere food to the peoples of the Mediterranean: it has been medicinal, magical, an endless source of fascination and wonder and the fountain of great wealth and power. The olive tree, symbol of abundance, glory and peace, gave its leafy branches to crown the victorious in friendly games and bloody war, and the oil of its fruit has anointed the noblest of heads throughout history. Olive crowns and olive branches, emblems of benediction and purifiation, were ritually offered to deities and powerful figures: some were even found in Tutankhamen's tomb.

Cultivating the Sacred

Olive culture has ancient roots. Fossilized remains of the olive tree's ancestor were found near Livorno, in Italy, dating from twenty million years ago, although actual cultivation probably did not occur in that area until the fifth century B.C. Olives were first cultivated in the Eastern part of the Mediterranean, in the region known as the "fertile crescent," and moved westwards over the millennia.

Beginning in 5000 B.C. And until 1400 B.C., olive cultivation spread from Crete to Syria, Palestine, and Israel; commercial networking and application of new knowledge then brought it to Southern Turkey, Cyprus, and Egypt. Until 1500 B.C., Greece—particularly Mycenae—was the area most heavily cultivated. with the expansion of the Greek colonies, olive culture reached Southern Italy and Northern Africa in the eighth century B.C., then spread into Southern France. Olive trees were planted in the entire Mediterranean basin under Roman rule. According to the historian Pliny, Italy had "excellent olive oil at reasonable prices" by the first century A.C, "the best in the Mediterranean," he maintained.

In the land of the Hebrews, King Solomon and King David placed great importance on the cultivation of olive trees; King David even had guards watching over the olive groves and warehouses, ensuring the safety of the trees and their precious oil.

Olive trees dominated the rocky Greek countryside and became pillars of Hellenic society; they were so sacred that those who cut one down were condemned to death or exile. In ancient Greece and Rome, olive oil was the hottest commodity; advanced ships were built for the sole purpose of transporting it from Greece to trading posts around the Mediterranean.

The belief that olive oil conferred strength and youth was widespread. In ancient Egypt, Greece, and Rome, it was infused with flowers and with grasses to produce both medicine and cosmetics; a list was excavated in Mycenae enumerating the aromatics (fennel, sesame, celery, watercress, mint, sage, rose, and juniper among others) added to olive oil in the preparation of ointments.

Olive trees have an almost titanic resistance, a vital force which renders them nearly immortal. Despite harsh winters and burning summers, despite truncations, they continue to grow, proud and strong reaching towards the sky, bearing fruit that nourishes and heals inspires and amazes. Temperate climactic conditions, characterized by warm dry summers and rainy winters, favor plentiful harvests; stone, drought, silence, and solitude are the ideal habitat for the majestic olive tree. Italy and Spain are now the most prolific producers of olive oil, although Greece is still very active. There are about thirty varieties of olives growing in Italy today, and each yields a particular oil with its own unique characteristics.

Olive Oil Properties

Sun, stone, drought, silence and solitude: these are the five ingredients that, according to Italian folk traditions, create the ideal habitat for the olive tree.

We treasure extra-virgin olive oil for its nutritional and salutary virtues. La Cucina Italiana reports that extra-virgin olive oil is the most digestible of the edible fats: it helps to assimilate vitamins A, D and K; it contains so-called essential acids that cannot be produced by our own bodies; it slows down the aging process; and it helps bile, liver and intestinal functions. It is also valued for its culinary virtues and organoleptic properties as well: flavor (sapore), bouquet (aroma), and color (colore)

Climate, soil, variety of tree (cultivar) and time of harvest account for the different organoleptic properties of different oils. Certain extra-virgin olive oils are blends of varieties of olives; others are made from one cultivar.

The European Community gives the following parameters:

• Extra-virgin olive oil with perfect taste is oil of the highest quality; it has a minimum organoleptic rating of 6.5 out of 10, low acidity (1% or less), and is untreated.
• Olive oil has a minimum organoleptic rating of 5.5, a maximum of 2% acidity and is untreated.
• The production of all other olive oils involves treatments.

Extra-virgin olive oil is produced in all regions of Italy, except Piedmont and Val D'Aosta. The leading producers are Liguria, Tuscany, Umbria, and Apulia. Tuscany produces such a great assortment of extra virgin oils that many do not resemble each other. In Umbria, it is so widely produced that it would be hard to imagine the landscape without the abundance of olive trees. Apulia is home to an impressive one-third of Italy's olive trees.

The price of extra-virgin olive oil varies greatly. Two factors are influential: where the olives are grown and which harvesting methods are implemented. Certain locations yield more bountiful harvests; consequently their oil is sold for less. Olive trees planted near the sea can produce up to 20 times more fruit than those planted inland, in hilly areas like Tuscany. It is in these land-locked areas that the olive trees' habitat is pushed to the extreme; if the conditions were just a little more severe, the trees would not survive. Extra-virgin oils produced from these trees have higher organoleptic scores.