Archived version: https://web.archive.org/web/20240115080030/https://www.euronews.com/2024/01/15/olive-oil-scams-are-proliferating-how-do-you-spot-a-fake-extra-virgin
Archived version: https://web.archive.org/web/20240115080030/https://www.euronews.com/2024/01/15/olive-oil-scams-are-proliferating-how-do-you-spot-a-fake-extra-virgin
Answer from the article : "simple analysis can unmask the fraud. Like the fatty acids composition test, or the sterol composition, as well as the spectrophotometric constants"
Oh. OK. Easy. Next time at the grocery store I will check that.