posted February 09, 2015 08:01 PM            

The only way to know you are buying pure extra virgin olive oil is to get estate oil, where the estate olives are the only ones used in the pressing.

Im told there is a test you can do to check if the oil is olive oil or not. Place a spoonful on a plate and put it in the fridge. Then take it out ten minutes later and smell it. If the smell went away then it's not 100 percent extra virgin olive oil. Most likely it's sunflower oil, or other oils that have color and essences added. I'm not sur if this works but you can try it.

Her's a link to start your own investigation: http://www.forbes.com/sites/cathyhuyghe/2014/03/05/the-scam-of-olive-oil-and-its-antidote/

There are more sites and there is a guidebook mentioned in the above link. If you talk to an olive oil expert, not someone who sells it, but someone who review olive oil you may find out more info.