Demi, I heard the same thing in several articles over the months--which is why I no longer use any of it. I'ts touted as being healthy, but it's actually toxic in the body.

From what I read , the good oils to use are sawflower, sunflower seed, pumpkin seed, first pressed olive oil, unrefined raw coconut and unrefined raw palm oil, hemp oil,etc. The only oil that won't turn toxic during stir frying is the raw coconut oil. Even olive oil --when heated a certain temperature-- turns toxic.

Canola oil is just plain toxic cold or hot.