How to know if the olive oil you are buying is really good (it's not enough to say extra virgin)

Olive oil has many health benefits, including reducing the risk of dementia, poor heart health, cognitive decline or premature death.

How beneficial the staple food of the Mediterranean diet is depends on how the product is harvested, processed, stored and used - on farms or mills, supermarkets and in your own home.

"The health benefits come from a variety of factors or components in olive oil," said Tassos Kyriakides, assistant professor of biostatistics at the Yale School of Public Health in New Haven, Connecticut, in the United States. "The main one is oleic acid, and this has been shown to have very healthy benefits."

Also important is the amount of polyphenols in olive oil, which are a type of antioxidant that helps protect ...
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