Is OU fine for olive oil and extra virgin olive oil?
Acceptable.
Many argue that Virgin olive oil, or extra virgin olive oil needs no kosher suprevision. Look out for the certification from the a International Olive Oil Council. Still, since olive oil fraud is rampant, there is room for concern about fraud and a hechsher definitely alleviates this concern.
Fine olive oil, however, needs a proper hecsher.
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