Earlier quoted context omitted.
Sunflower oil has even higher PUFA content than soybean, which is presumably the cause of these health issues in mice. I believe soybean was just chosen for the study because it's extremely ubiquitous in the US. edit: Partially wrong! I'm told above that high oleic sunflower oil has a different profile with less linoleic oil, and apparently it's becoming more common: https://www.nutritionletter.tufts.edu/general-nutr…
Besides traditional sunflower oil, which contains mostly linoleic acid (a PUFA), now there is "high oleic sunflower oil", which is extracted from a variety of sunflower initially developed in Russia some 50 years ago, but now grown in most countries. This non-traditional sunflower oil has little PUFA and it is perfect for frying and baking. The sunflower variety grown for high oleic oil has a genetic mutation with th…
The detail about forcing genetic mutation is neat, will have to read up on that.