I have recently watched a Chinese Cooking Demystified video (I believe it was [1]) about the Chinese rapeseed oil and its comparison in taste and erucic acid contents to Canola oil, which is its only available variant in Western countries.
The video stated a thesis echoed on Wikipedia's page on Erucic acid [2]:
> Studies done on laboratory animals in the early 1970s show that erucic acid appears to have toxic effects on the heart at high enough doses. However, more recent research has cast doubt on the relevance of rat studies to the human health of erucic acid. Rats are unusual in their inability to process erucic acid, and the symptoms in rats caused by a diet with high levels of erucic acid has not been observed in pigs, primates, or any other animals.
From what I understand, all the references in the Oatly article focus on Canola oil, which is supposed to be low on erucic acid. However, the few (~3) research sources in the Oatly article that I clicked on all do rat/mouse studies. Isn't that kind of strange, considering the erucic acid rat research controversy?
The Wikipedia page on Canola oil [3] does not mention the health risks aside from the erucic acid controversy. Still, since Canola oil is such an important product, I can imagine any negative studies or claims could be contested. (Disclaimer: I have not checked the edit history of that page myself.)
To sum up, I currently have no idea if Canola oil or rapeseed oils in general are risky, healthy in reasonable doses, or something else completely. If anyone with any expertise comes around, please educate me.
[1]: https://www.youtube.com/watch?v=xDP9t65PVsY