Is canola oil safe? Google tells us:

• Canola oil is one of the healthiest cooking oils available, with zero trans fat and the lowest amount of saturated fat of all common cooking oils. And because canola oil is so versatile and affordable, it's ideal for making a wide range of healthy foods, both at home and on a commercial scale.
  The source: Canola Council of Canada. (Of course they would say it's safe, they sure would not say it's not safe, but use it anyhow.) See also: soybean oil

Medical News Today says:
One 2013 reviewTrusted Source claims that canola oil is one of the healthiest vegetable oils, as it reduces disease-related factors and improves health. Although the study appears in a peer reviewed journal, it has the support of organizations in the canola oil industry.
A 2016 book claims that many dietitians believe that canola oil should be considered the healthiest edible oil due to its fatty acid composition and other nutrient properties. It also contains a low amount of saturated fat compared with other vegetable oils.
One 2011 study concludes that people who eat more canola oil than other oils rich in saturated fatty acids may experience lipid-lowering effects. The researchers also suggest that canola oil could be considered heart-healthy.

And also:
Some research suggests that canola oil may harm health.
Although marketers often promote canola oil as a heart-healthy fat and alternative to other oils, some studies regard it as potentially harmful.
One 2018 study suggests that people who use canola oil for cooking may be more likely to have metabolic syndrome.
This study contradicts a review that claims that people who consume canola oil may have fewer heart disease risks, such as high low-density lipoprotein cholesterol levels. This review has funding from organizations in the canola industry.
It is unclear whether canola oil is harmful or beneficial to heart health, so more research is necessary.
etc.