Re: What type of Olive Oil to use for Liver Flush?

Ensure that your oil is labelled "extra virgin," since other categories—"pure" or "light" oil, "olive oil" and "olive pomace oil" – have undergone chemical refinement.

Try to buy oils only from this year's harvest – look for bottles with a date of harvest. Failing that, look at the "best by" date which should be two years after an oil was bottled.

Though not always a guarantee of quality, PDO (protected designation of origin) and PGI (protected geographical indication) status should inspire some confidence.

Some terms commonly used on olive oil labels are out of date, such as "first pressed" and "cold pressed". Since most extra virgin oil nowadays is made with centrifuges, it isn't "pressed" at all, and true extra virgin oil comes exclusively from the first processing of the olive paste and is very expensive.

http://www.theguardian.com/lifeandstyle/2012/jan/04/olive-oil-real-thing
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