[feet]

Sounds to me like if you avoid heating them it's fine, which means there should be no issue with dietary PUFAs.

[Jensson]

Yeah, canola oil should be fine to use if you add it to food yourself. But as ingredients in fastfood or bread or chips it is likely they heated it enough to create trans fats.

[feet]

So the heating thing appears to be false. I wasn't able to locate literature in my brief search on the subject so perhaps someone can post a link