What's the worst oil to cook with?

Chef's answer
5 Worst Cooking Oils that Aren't Really Healthy:
  • Grapeseed Oil. I know this one is going to be a big shocker for a lot of people. ...
  • Canola oil. ...
  • Vegetable oil/Soybean oil. ...
  • Margarine or Vegan Butter Substitutes (Earth Balance) ...
  • Corn Oil.
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