Experts say lots of factors determine how quickly an oil deteriorates — from the variety of the olives, to how the oil is produced and stored.
September 30, 2013 Increasingly, high quality oils have a harvest date stamped on the label. Why? Olive oil goes rancid and loses many of the beneficial compounds in just a few months. If the oil stings the back of your throat, the beneficial compounds are there, experts say.
<iframe src="http://www.npr.org/player/embed/226844915/227699524" width="100%" height="290" frameborder="0" scrolling="no">
Don't hold back on the olive oil, a Spanish study concludes.
February 25, 2013 People who stuck with diets rich in olive oil and nuts had about a 30 percent lower risk of experiencing a major cardiovascular problem, such as a heart attack or stroke, than people who followed a low-fat diet.
December 6, 2012 Across the U.S., olive oil production is expanding. But domestic product accounts for only a small sliver of olive oil sold in the U.S. American producers say their foreign competitors aren't playing fair. One issue: mislabeling.
<iframe src="http://www.npr.org/player/embed/166662525/166685463" width="100%" height="290" frameborder="0" scrolling="no">
Palestinian women harvest olive trees near the occupied West Bank village of Deir Samet near the town of Hebron.
Hazem Bader/AFP/Getty Images
December 5, 2012 Olive trees symbolize peace and freedom for the Palestinian people, but the economic realities of living in the West Bank are making it harder than ever to cultivate and harvest this traditional food source.
<iframe src="http://www.npr.org/player/embed/164968137/166545995" width="100%" height="290" frameborder="0" scrolling="no">
A Greek farmer drives home with his fresh pressed olive oil in barrels near Alyki, Greece. The country's pure olive oil is hard to find, expensive and poorly marketed, businessmen say.
September 25, 2012 Greek businessmen say the country has never managed to properly market its prized olive oil. They say many of the country's business practices will have to change if it is to become a player on the world market.
<iframe src="http://www.npr.org/player/embed/161760882/161767132" width="100%" height="290" frameborder="0" scrolling="no">
Got olive oil?
June 16, 2011 French researchers found an association between liberal use of olive oil and a lower risk of stroke for elderly people. The findings suggest consumption of the oil could have a health benefit, but the claim needs to be proved in more rigorous study, other researchers say.
NPR thanks our sponsors
Become an NPR sponsor