[cmurf]

The interesting part of that report is imported extra virgin olive oil is vastly more likely to be merely virgin due to refined or oxidized olive oil present, compared to California olive oils.

But then this research is also financed by the California Olive Oil Council, and also by the company of the best testing brand. So there's a possible conflict there, or it may be that they know they have better certification and monitoring therefore a better/more consistent product, than the name/top selling brands primarily sourcing from imported olive oil, and they're investing in research to quantify this.