I'm definitely taking my UV torch to the supermarket next time. However, most good olive oils come in dark glass bottles, so I don't think it will be possible to check those. Might be interesting to look for variation among the cheaper EV ones.
The article mentions differences between brands, but IDK if there's a specific correlation with quality other than that fake olive oils certainly won't turn red/pink.
The article mentions differences between brands, but IDK if there's a specific correlation with quality other than that fake olive oils certainly won't turn red/pink.