Claim: Most olive oils found in supermarkets do not contain significant amounts of oleocanthal due to exposure to heat, light, and air, which degrade the polyphenols.
Verdict: Unverified (50% confidence)
Explanation: According to the Artisan Olive Oil Company, most supermarket olive oils contain very low levels of polyphenols, including oleocanthal, unless they are specifically marketed as high-phenolic or premium extra virgin olive oils. The Olive Oil Professor states that exposure to light, heat, and air causes oxidation, which degrades polyphenols in olive oil. Citizens of Soil also supports that most supermarket oils don't typically contain significant oleocanthal unless marketed as premium. These source...