Is canola oil “toxic,” as many people warn?
No. The confusion involves erucic acid, a substance in traditional rapeseed that has been linked with structural changes in heart tissues and other problems in animals. But canola has been specifically bred to be very low in erucic acid. In 1981, several hundred deaths in Spain were linked to food-grade rapeseed oil—but it turned out the oil (mislabeled as “olive oil”) was contaminated with an industrial solvent that was being used illegally.
Despite the long-standing safety of canola oil, the Internet is still awash with rumors that it causes all kinds of maladies. There has never been any evidence to support these claims. According to the EPA, canola oil’s “toxicological profiles are similar to those of other vegetable oils that are used as food.”