3. Look out for a precise point of production and certifications
As a rule, most of the highest-quality oils will list the name of the specific mill that produced it. If you can’t find one, skip it. Also look out for what are known as “PDO” or “PGI” certifications, which indicate that a given oil was made in a specific region using traditional production methods.
4. Beware of misleading origin labels
Oftentimes, producers will try to pass off their oil as a “product of Italy” when in fact they were simply packaged there. Many cheaper, lesser-quality oils labeled as such actually originate in places like Greece, Spain, or Tunisia.