橄榄油的问题多多很多年了，一样东西被promote太厉害总会出问题，供赶不上需的时候，利益诱人，掺假不可避免，

https://munchies.vice.com/en_us/article/xy7a4k/italy-just-broke-up-a-multi-million-dollar-olive-oil-scheme

http://www.oleumproject.eu/partners/consortium

One in three bottles of olive oil sold in Britain are fake or of poor quality：

https://www.thetimes.co.uk/article/one-in-three-bottles-of-olive-oil-sold-in-britain-are-fake-or-of-poor-quality-3j9xkxlpn