Your suspicion is substantiated [1]. Olive oil bought from U.S. producers will have had substantially less opportunity for adulteration, as their processes are

Your suspicion is substantiated [1]. Olive oil bought from U.S. producers will have had substantially less opportunity for adulteration, as their processes are certified by U.S. authorities (this is a mitigation and not a guarantee). 1. https://www.telegraph.co.uk/news/worldnews/europe/italy/11988947/Italian-companies-investigated-for-passing-off-ordinary-olive-oil-as-extra-virgin.html https://www.telegraph.co.uk/news/worldnews/europe/italy/1198...