As I understood the magazine article, the mineral oil could come from a couple of sources, including for example harvesting machinery.
I wonder if seed-based oils (like rapeseed a.k.a. canola) would be better in this regard, as the seeds are maybe a bit more protected until a later stage of processing... just guessing here though. Olives seem to be a bit of an outlier because there it's also the fruit that is oily and used is used for making the oil.
Do you know by chance if ÖkoTest also did tests with other types of oils?
Edit: Just checked the recommended articles, they also tested rapeseed. TLDR; nope, not better
The tests I'm finding seem to be mostly white-label brands with who knows what kind of oil. I'm talking about single source olive oil. It's a bit more expensive but you generally get oil from small operations and co-ops that can be either eco or not.
I wonder if seed-based oils (like rapeseed a.k.a. canola) would be better in this regard, as the seeds are maybe a bit more protected until a later stage of processing... just guessing here though. Olives seem to be a bit of an outlier because there it's also the fruit that is oily and used is used for making the oil.
Do you know by chance if ÖkoTest also did tests with other types of oils?
Edit: Just checked the recommended articles, they also tested rapeseed. TLDR; nope, not better
https://www.oekotest.de/essen-trinken/Rapsoel-Test-Die-meist...